Instructions for creating a Bit Map Logo
The logo should have a pure white background and single color foreground.
Open the logo in Windows Paint.
In properties (File > Properties) set to Black and White and click OK twice. If the entire picture goes all black or all white then you know it won't work.
Go back to properties, set to color and click OK. This part is important to make it compatible with Altium for pasting.
Select All (Control-A) and copy (Control-C)
Paste into Altium then re-size it with the 4 corner handles.
Eric's Suggested Solution *****
To scale the bitmap/regions: