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When distributing a projector, you may or may not need to include all the contents of Impressario's Resources folder in the Xtra's folder next to your projector.
Within that folder there are two sub-folders: Fonts and CMaps. Inclusion of the Fonts folder is not an issue, because it only weighs 1 MB and doesn't impact the overall size of the project. However, because the CMaps folder is rather large (6 MB), you don't want to include it unnecessarily.
Recommended practice is to embed all fonts within your PDF document so that they can be viewed properly from any platform.
If your PDF documents require special fonts and they are not embedded within the documents, you will need to add them to the Fonts folder before distributing your project. If you do not, the application will need to substitute them with an appropriate "multimaster" font. This is only an option for typefaces; symbol fonts must be embedded and subset within the PDF document, as their glyphs cannot be simulated with a "multimaster" font.
If you are distributing special fonts with your project, make sure you have any required distribution licenses.
The files in the CMaps folder contain the various character mappings that are used to map input keystroke values to the appropriate output "glyph" (picture of the character).
If your project only involves viewing and printing PDF documents and the fonts are embedded within the document, you can remove the CMaps files and it should still appear correctly. Note that CID fonts (e.g. multibyte and Unicode) must be embedded and subset within the PDF document, to work reliably.
If your PDF document contains form fields, you may need the CMaps files to map the users' keyboard strokes to the appropriate glyphs.