Changing the bitmap fill to a transparent bitmap fill and vice versa?

[Acorn]

actually acorn I read it as wanting to replace a bitmap fill that has been repositioned/resized - hence rsrsrs' reference to scaling in his first post

Acorn - Reinhard was not clear and this may be a language issue. My solution is based on a bitmap with transparency applied to a part of the bitmap as opposed to the entire bitmap.
And the two fills, which reside in the Bitmap Gallery were applied to two duplicate shapes and the fills match.

@handrawn, you're right and I'm wrong.
@Gary, I took it as a Bitmap Fill in a Shape to become a Bitmap Transparency that keeps the same size and alignment.

@reinhard, the only solution I can determine is to make a Bitmap Copy of your rotated and scaled image then to place a no Fill Shape under it and make a Clipped copy of the two.

With this you can apply a Transparency and also dynamically change the position, size and alignment of the clipping shape.

Acorn

[handrawn]

I can see that working acorn....

I just tested dragging a completely transparent bitmap off the desktop whilst holding shift, and that appears to work too...