custom groupe keyframes (preselection to reuse often)

i want to propose some ideas related to select gouped operator — i work with Gpencil often and now we can see Drawing kf and kf of properties in the dopesheet, in that context,

i would like to see a feature to create custom groupe of keyframes (in other words preselection stored to reuse it ) so it easy to select a goupe of keyframes that i desire to move or scale … especially i often work with grease pencil and i want many properties keframes follow a drawing keyframe (that are places in many different frames) . so if i select a grouped kf , all kfs that are linked to this kf got selected by default,

and if we want to select this kf only we can use alt+R click .

with those next operators the workflow will be much more robust:

join selected custom groupes - split - add new kf to existed custom groupe - rename the selected custom goupe - ajuste kf position that is grouped but without any change for the goupe position (which means a local change for a kf without changing for other kfs within the same preselection ) by shortcuts like alt+R click then G to move or scale … etc also an operator to ungroupe a kf and a bunch of kfs . hope this can reach the needs of the community and important for all animators