Scale factor

[asusca]

In my opinion, it would be useful to introduce a global instance parameter, or, better, a couple of instance parameters (for both the two coordinate directions), in order to scale title blocks, annotations and raster images.

[aaronrumple]

Titleblocks don't need to be scaled as families take care of types and sizes.
Annotations already scale automatically.

Raster images are a whole different issue. How Revit supports raster images needs to be re-thought in my opinion.

[asusca]

I've thought of annotations, since i had to solve this problem: i have a logo for my own firm; first, i imported it into revit, and in order to personalize a sheet, i created several annotation containg the properly rescaled images (imported as .BMP) arranged with some tags (the address, phone number,e-mail, ...); then i planned to insert these annotations into a title block, and, at last, to insert this last family (title block) with nested families (annotation containing images) into the the current project: but, PROBLEM/BUG, nested images aren't displayed into the project. So, i decided to create an annotation object containg a vector logo, in order to start again the process; but, to create different annotation object you have now, in my opinion, to draw again the logo each time: IT WOULD BE (VERY) USEFUL TO BE ABLE TO (RE)SCALE A NESTED ANNOTATION FAMILY. Cheers.

[aaronrumple]

You can. Make the logo an imported DWG. These can be scaled.
You want to post an image/file? What you want to accomplish sounds very possible, I'm just not sure of the exact end goal...