Canvas.Invalidate
I already miss it in a window from a current project because it is not in the Canvas auto-complete list in Xojo 2015r1. (not reported for a one year old version).
Now, I wanted to check something (that I do not remember) and so I fired Xojo 2016r1.1 and I do not found it, stop, take a glass of water with a touch of mint syrup
Then, I came back and watched once more the Language Reference (off-line) and I still not found it. At last, when I clicked in the Canvas entry, I found it.
Nothing special to report here you may say. BUT, when my glass of green water was empty I realized that Canvas.Invalidate is in the list of entries 
boooo
There is another serie of Canvas.xyz entries after
WebCanvas.Shown. To be complete, there are 11 Canvas entries after WebCanvas.Shown, then WebCanvas. entries restart.
And one person from this list imply that I am slow ?
Some other may say that I am happy, iOS entries may appears too ! BUT this is already the case.
I suspect a double alphabetical sort: the Canvas entries are sort by Events, By Properties, by Methods
(read: Canvas, iOSCanvas, WebCanvas
).
BTW: I do not use iOS nor Web, but I do not complain about that: I complain about the way the help is displayed. Every help user is concerned, not just me.
If I type iOSCanvas in the Language Reference Search returns the iOSCanvas help
just like WebCanvas !
The display problem exists only with the good old Canvas.