So I've been trying to stretch midi clips - and boy but it won't work.  Stretching audio clips - with control shift - works fine, the percentage appearing where it should in the clip's top right hand corner; it does not work with midi clips. I've taken to freezing them and stretching accordingly (which works in audio form, unfreezing sends you back where you started). 
 
Anyone else run into this?  
 
 
 
[all the latest SPLAT, windows 10 up to date, Roland Studio Capture (though I doubt that's the problem)]

Just tested with 2017.10 and it works OK using the first method described in the help under "To stretch a MIDI clip." Make sure the MIDI clip is not a groove clip (CTRL+L is the groove clip toggle).

thank you, Scook, that worked. Not sure how the clips ended up as groove clips, but job done.