I meant it creates several image sizes in the cPanel screenshot: http://prntscr.com/8ey1x3 So I command out with this code
//* add_image_size but the image appear as full size now http://prntscr.com/8ez46l
The other problem is: I try to create tag menu called “flex” http://prntscr.com/8ez3ol and I have set 300×200 thumbnail size in my Setting >>> Media. But the flex menu doesn’t show the thumbnail, instead it is showing full size. Do I need to create specific template for tag menu?