Fastest way to add frames between each keyframes

[phi_0112]

Hello everyone, I want to ask if there is a faster way than pressing F5 for each keyframe to add frames between the keyframes? I once saw an old video where someone selected all the keyframes and pressed a certain key to be able to enter the number of frames they wanted to add between the keyframes
-Thanks for reading, and sorry for my poor English.

[n. tilcheff · Accepted solution]

Hover the cursor over the vertical yellow line at the end of your frame span.

Drag it to the right and release.

[phi_0112]

Thank you very much, even though some frames have uneven spacing, it still works very well. Thank you for helping me

[n. tilcheff]

When you drag, look for the 'x2' marker.

Try with 10 frames to see how it works.