How to change in product detail page...?

In My Product Detail Page View,

Product Details Left Side And Product Image Right Side,

But I Want My Product Detail Right Side And I Want My Product Image Left Side.

So Please Help Me Im New In NopCommerce.

Hope you are not using default theme and you might be using custom theme refer \Themes\<your theme name>\Views\Product\ProductTemplate.Simple.cshtml file in your solution. It will give source code around your requirement and make the required changes to html and css

Sir Thank You For Help Me, This Is My ProductTemplate.Simple.cshtml Source Code And In This Source Code Through I Want To Set My Product Full Details Right Side And Image Detail Left Side.

My Source Code Is Here:

@model ProductDetailsModel
@using Nop.Core
@using Nop.Core.Domain.Seo;
@using Nop.Core.Infrastructure;
@using Nop.Services.Localization;
@using Nop.Services.Configuration
@using Nop.Web.Models.Catalog;
@using Nop.Admin.Controllers;
@using Nop.Admin.Models.Catalog;

@{
    Layout = "~/Views/Shared/_ColumnsOne.cshtml";

    //title, meta
    Html.AddTitleParts(!String.IsNullOrEmpty(Model.MetaTitle) ? Model.MetaTitle : Model.Name);
    Html.AddMetaDescriptionParts(Model.MetaDescription);
    Html.AddMetaKeywordParts(Model.MetaKeywords);

    var seoSettings = EngineContext.Current.Resolve<SeoSettings>();
    //canonical URL
    if (seoSettings.CanonicalUrlsEnabled)
    {
        var productUrl = Url.RouteUrl("Product", new { SeName = Model.SeName }, this.Request.Url.Scheme);
        Html.AddCanonicalUrlParts(productUrl);
    }

    //open graph META tags
    if (seoSettings.OpenGraphMetaTags)
    {
        var storeName = EngineContext.Current.Resolve<IStoreContext>().CurrentStore.GetLocalized(x => x.Name);
        Html.AddHeadCustomParts("<meta property=\"og:type\" content=\"product\" />");
        Html.AddHeadCustomParts("<meta property=\"og:title\" content=\"" + Html.Encode(Model.Name) + "\" />");
        Html.AddHeadCustomParts("<meta property=\"og:description\" content=\"" + Html.Encode(Model.MetaDescription) + "\" />");
        Html.AddHeadCustomParts("<meta property=\"og:image\" content=\"" + Model.DefaultPictureModel.ImageUrl + "\" />");
        Html.AddHeadCustomParts("<meta property=\"og:url\" content=\"" + Request.Url.AbsoluteUri + "\" />");
        Html.AddHeadCustomParts("<meta property=\"og:site_name\" content=\"" + Html.Encode(storeName) + "\" />");
    }

    //Twitter META tags
    if (seoSettings.TwitterMetaTags)
    {
        var storeName = EngineContext.Current.Resolve<IStoreContext>().CurrentStore.GetLocalized(x => x.Name);
        Html.AddHeadCustomParts("<meta property=\"twitter:card\" content=\"summary\" />");
        Html.AddHeadCustomParts("<meta property=\"twitter:site\" content=\"" + Html.Encode(storeName) + "\" />");
        Html.AddHeadCustomParts("<meta property=\"twitter:title\" content=\"" + Html.Encode(Model.Name) + "\" />");
        Html.AddHeadCustomParts("<meta property=\"twitter:description\" content=\"" + Html.Encode(Model.MetaDescription) + "\" />");
        Html.AddHeadCustomParts("<meta property=\"twitter:image\" content=\"" + Model.DefaultPictureModel.ImageUrl + "\" />");
        Html.AddHeadCustomParts("<meta property=\"twitter:url\" content=\"" + Request.Url.AbsoluteUri + "\" />");
    }

    var storeId = EngineContext.Current.Resolve<IStoreContext>().CurrentStore.Id;
    var alternativeProductPageLayout = EngineContext.Current.Resolve<ISettingService>().GetSettingByKey("allurethemesettings.alternativeproductpagelayout", false, storeId, true);
    var alternaticeProductPageLayoutCss = String.Empty;
    if (alternativeProductPageLayout)
    {
        alternaticeProductPageLayoutCss = "product-page-alternative-layout";
    }
}
<!--product breadcrumb-->
@Html.Partial("_ProductBreadcrumb", Model.Breadcrumb)

<div class="product-page-wrapper" itemscope itemtype="http://schema.org/Product">
    <!--product breadcrumb-->
    <div class="product-name">
        <h1 itemprop="name">
            @Model.Name

        </h1>
        @Html.Widget("productname_bottom", Model.Id)
    </div>
    <div class="page product-details-page @alternaticeProductPageLayoutCss">
        <div class="page-body">
            @Html.Widget("productdetails_top", Model.Id)
            @using (Html.BeginRouteForm("Product", new { SeName = Model.SeName }, FormMethod.Post, new { id = "product-details-form" }))
            {
                <div data-productid="@Model.Id">
                    <div class="product-essential">

                        @{
                var picturesInTabHtml = Html.Widget("product_pictures_in_tabs", Model.Id);

                if (!MvcHtmlString.IsNullOrEmpty(picturesInTabHtml) && !alternativeProductPageLayout)
                {
                    @picturesInTabHtml
                }
                else
                {
                    var cloudZoom = Html.Widget("sevenspikes_cloud_zoom");
                    if (!MvcHtmlString.IsNullOrEmpty(cloudZoom))
                    {
                        @cloudZoom
                    }
                    else
                    {
                        @Html.Partial("_ProductDetailsPictures", Model)
                    }
                }
                        }

                        <div class="overview">
                            @if (!String.IsNullOrEmpty(Model.ShortDescription))
                            {
                                <div class="short-description">
                                    @Html.Raw(Model.ShortDescription)
                                </div>
                            }
                            <!--rental products-->
                            @{
                            var dataDictRental = new ViewDataDictionary();
                            dataDictRental.TemplateInfo.HtmlFieldPrefix = string.Format("rental_{0}", Model.Id);
                            @Html.Partial("_RentalInfo", Model, dataDictRental)
                            }
                            @{
                            var dataDictPrice = new ViewDataDictionary();
                            dataDictPrice.TemplateInfo.HtmlFieldPrefix = string.Format("price_{0}", Model.Id);
                            @Html.Partial("_ProductPrice", Model.ProductPrice, dataDictPrice)
                            }
                            <!--attributes-->
                            @{
                            var dataDictAttributes = new ViewDataDictionary();
                            dataDictAttributes.TemplateInfo.HtmlFieldPrefix = string.Format("attributes_{0}", Model.Id);
                            @Html.Partial("_ProductAttributes", Model.ProductAttributes, dataDictAttributes)
                            }

                            <!--Custom code by Karan 17/05/2015. Show the conformation of the manual status.-->
                            <span class="status-message">@Model.ManualStatus</span>

                            <!--availability-->
                            @Html.Partial("_Availability", Model)

                            
                            <!--price & add to cart-->
                            @{

                            var dataDictAddToCart = new ViewDataDictionary();
                            dataDictAddToCart.TemplateInfo.HtmlFieldPrefix = string.Format("addtocart_{0}", Model.Id);
                            @Html.Partial("_AddToCart", Model.AddToCart, dataDictAddToCart)
                            }
                            <!--delivery-->
                            @Html.Partial("_DeliveryInfo", Model)
                            <!--product reviews-->
                            @Html.Partial("_ProductReviewOverview", Model.ProductReviewOverview)
                            <div class="buttons">
                                @Html.Widget("productdetails_inside_overview_buttons_before", Model.Id)
                                @{
                            var dataDictAddToWishlist = new ViewDataDictionary();
                            dataDictAddToWishlist.TemplateInfo.HtmlFieldPrefix = string.Format("addtocart_{0}", Model.Id);
                            @Html.Partial("_AddToWishlist", Model.AddToCart, dataDictAddToWishlist)
                                }
                                @Html.Partial("_CompareProductsButton", Model)
                                @Html.Partial("_ProductEmailAFriendButton", Model)
                                @Html.Widget("productdetails_inside_overview_buttons_after", Model.Id)
                            </div>

                            @Html.Partial("_ShareButton", Model)
                            @Html.Widget("productdetails_overview_top", Model.Id)
                            <!--SKU, MAN, GTIN, vendor-->
                            @Html.Partial("_SKU_Man_GTIN_Ven", Model)
                            <!--product manufacturers-->
                            @Html.Partial("_ProductManufacturers", Model.ProductManufacturers)
                            <!--sample download-->
                            @Html.Partial("_DownloadSample", Model)

                            @Html.Widget("productdetails_overview_bottom", Model.Id)
                        </div>
                        @if (!String.IsNullOrEmpty(Model.FullDescription))
                        {
                            <div class="full-description" itemprop="description">
                                @Html.Raw(Model.FullDescription)
                            </div>
                        }

                        <!--gift card-->
                        @{
                        var dataDictGiftCard = new ViewDataDictionary();
                        dataDictGiftCard.TemplateInfo.HtmlFieldPrefix = string.Format("giftcard_{0}", Model.Id);
                        @Html.Partial("_GiftCardInfo", Model.GiftCard, dataDictGiftCard)
                        }
                    </div>
                    @if (alternativeProductPageLayout)
                    {
                        @Html.Widget("product_pictures_in_tabs", Model.Id)
                    }
                    @Html.Widget("productdetails_before_collateral", Model.Id)
                    <div class="product-collateral">
                        @Html.Partial("_ProductTierPrices", Model.TierPrices)
                        @Html.Partial("_ProductSpecifications", Model.ProductSpecifications)
                        @Html.Partial("_ProductTags", Model.ProductTags)
                        @Html.Action("ProductsAlsoPurchased", "Product", new { productId = Model.Id })
                        @Html.Action("RelatedProducts", "Product", new { productId = Model.Id })
                    </div>
                </div>
            }
            @Html.Widget("productdetails_bottom", Model.Id)
        </div>
    </div>
</div>

For me it looks like you are using nop-templates theme, could you tell me which theme you are using, Hope you need some changes to css as well. If you have valid license for nope-templates theme you could raise a support ticket as well. They will let you know if there is a options in the theme to swap content and product image with out code changes. nop-template support team response is very quick.