Difference between .tf and .tab suffixes

What’s the difference between using the suffix ‘.tf’ and ‘tab’? Do they have the same effect in the way Glyphs ‘reads’ them? Is it better to use ‘.tab’ for tabular currency? Is there a list of possible suffixes and their use anywhere?

Page 178 of the manual has a list.

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Thank you, George!

I’m asking all this about suffixes because I’m not sure how to do one thing: before, my figures without suffixes were my proportional lining figures. I made them with the same width and now my ‘default’ figures are tabular lining figures. The thing is, when trying to change and generate the feature .lnum automatically, Glyphs won’t add the .lf automatically. It won’t add the .lf automatically because it still ‘thinks’ that my figures without a suffix are proportional. Is there a way that Glyphs will add them now, since my no-suffix figures are now tabular? I’m not sure I’m making myself clear, sorry.

Maybe @mekkablue can help?

Why do you think that Glyphs thinks the defaults are proportionally? (You might be right, then re-opening the document should fix this.) What other number sets do you have?

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In order to find out what your default figures are, Glyphs needs to do some guess work. If you have three of the four recommended suffixes in use (.lf, .tf, .osf, .tosf), it assumes that the default is the one suffix not in use. Otherwise it measures width and heights of key glyphs.

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I will try this! Thank you, Georg! I had four suffixes in use, that might have been the problem. I hadn’t decided if I was going to keep tabular figures as my default, so my .tf figures were not deleted. By the way, concerning figures, is keeping tabular figures as the default a good practice?

Good to know this! Thank you so, so much, Rainer! You guys are the best!

Also, maybe instead of deleting them, I just mark my .tf as non-exportable and Glyphs won’t ‘know’ about them.

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I like to have old style figures as default. Tabular lining are mostly good for list of numbers, so mostly in business or office contexts.

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