@Guizhou Duan -

If you are referring to the image itself, Miro is not a painting or image editing application and hence only provides limited options such as the ability to resize the image. To do anything more, you’d have to copy & paste the image into a proper image editing tool (e.g. Windows Paint), make the changes to it, and then paste it back.

Kiron

I thought I could edit the words and pics in the template.

If use windows paint, i still cannnot edit the words. 

Is there any other formats for similar template that I can add or delete words and copy/paste the content?