Does it meant that there's no keyframe there?

http://pasteall.org/pic/72f94828a94a762 ... 5676d3d3e9

Thanks

It's a 'hold frame'. This means that the frame to the left of the line will be repeated/held over each frame on the line. This is useful. If you don't want the frame to be held/repeated, just create a blank frame following it, then the blank frame will be held/repeated, etc.

Thank you ahabgreybeard

DPC