I read through the blender manual (33megas PDF file), and I didn’t find this option. Is it activateable? Or it never finished, and never activateable?
The documents contains some references, but there isn’t KEY combinations, or other.
It works on an existing curve in an existing channel.
Select the frame where you want to modify the curve. LMB the DLoc you want to use and add an IKey, grab, scale or rotate the object in the 3D window, move to the next IKey frame (if you need to) and add an IKey.
It doesn’t change the IPO curve, it just adds annimation relative to it. Difficult to explain but you’ll get it if you just experiment. Mostly you only need one D type IKey, it works it’s own way back to the IPO curve.
Yes, I did. Inserting keys for Rotation or Location doesn’t ever seem to change dLoc or dRot curves, no matter what kinds of selection/activation I try in the IPO window.
Yes, that’s what I usually do. However, thinking about it, don’t you think a button setting somewhere in the IPO window to switch between relative and absolute IPOs would be cool? If it’s set to “relative”, IKEY->Rot/Size/Loc automatically inserts dRot/dSize/dLoc keys.