When you run the thumbnail function, an large picture you upload will automatically create into a small one by system, which will speed up the loading and never zoom on website. Meanwhile this thumbnail will auto link to the big one and decrease according to the width and length proportion of original picture.

Statements for demo:

1. The system default is disabling this function. You can set it as well as related invocation conditions in the backend.
2. In this example it set that if the width or height of uploaded picture is above 250 px, the thumbnail function will come to work and create a thumbnail with a width or height of 100 px, which is reduced in scale.
3. Click preview in editing area after picture uploaded, you will observe a hyperlink of the created small icons. And click it you can get the original one.
4. This example allows uploading files of 100KB and only images with an extension of jpg or jpeg can produce correspondent thumbnail.

Caution: if you want to see effects of demo setup, it requires image files of less than 100 KB and with an extension of jpg or jpeg and with the width or height above 250px.