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http://www.webholism.com/blog/sara/virtuemart-2-0-how-to-change-the-thumbnail-size-of-your-products/
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VirtueMart 2.0 – How to Change the Thumbnail Size of Your Products
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Below are the instructions to change the size of your product thumbnails to the size you really want:
Go to Components -> VirtueMart
Click the Configuration button
In the Templates tab, tick the Enable Dynamic Thumbnail Resizing? box and set Thumbnail Image Width and Thumbnail Image Height to your desired values
Save & Close
Using FTP, browse to your /images/stories/virtuemart/product and /images/stories/virtuemart/category folders, and delete the resized folder
Create a new folder structure: /templates/YOUR-TEMPLATE/html/com_virtuemart/category
Copy the
file \components\com_virtuemart\views\category\tmpl\default.php and
place the copy in /templates/YOUR-TEMPLATE/html/com_virtuemart/category
Open /templates/YOUR-TEMPLATE/html/com_virtuemart/category/default.php
Change div class=”width30 floatleft center” to div class=”width100 floatleft center” and change div class=”width70 floatright” to div class=”width100 floatright center”
Add the following code to your template CSS file: .browse-view .row .product .spacer img, .related-products-view .row .product .spacer img{max-width:100%;}
Admire your handiwork.
ทำตามขั้นตอนนี้ ได้ผลจริง ไฟลื thumbnail เปลี่ยนจากขนาดประมาณ 50x50 px เป็น 120x120 px ตามต้องการ
