Just wondering if anyone’s played with the 3x3 grid for the mouse warp keys, and whether people prefer the 2x2 or the 3x3.
With the 3x3 grid, you have 9 warp keys.
And if you use the 3x3, how have you arranged them on the keyboard?
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I use the 3x3 grid and I have a warper layer which reuses the default mouse key locations.
I use my fn keys are layer modifiers, I have four achievable layers, left, right, left followed by right and right followed by left. 
Right FN is movement layer which has a 8 way directional normal mouse setup.
If I hold ; down whilst in that layer I activate a warper layer which has the warper keys overlaying the mouse directional keys. I use the semi-colon as it is comfortable to hold whilst the right fn is depressed.
I am attaching the layers section of my sketch to the post. I think this is a neat way to have the warper functionality with the full 8 way mouse keys all in the same physical location which makes it easy to use.
nevd.ino (6.6 KB)
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I used a 3x3 warp grid on a seperate layer (LockToLayer instead of SwitchToLayer) for a while and it worked quite well. But after getting myself a trackball I removed the layer since the trackball was faster to navigate. Here is a picture of the layer:
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