I spot a typo / thinko, the FRT-s and FRT-e look like milestones. They work similarly to cat, in that they let you get complicated styling, but the usfm is different and the way to style them are different. Ranged milestones (mostly) behave more like character styles that persist across paragraph boundaries. The format for using a ranged milestone would be:
\FRT-s\*
\mt1 Title
...
\FRT-e\*
To style this, you’d need to define a ranged milestone (FRT-s … FRT-e) and then you can specify character-style options to that, or for the complex style FRT-s+mt1
(safer). If you need to apply paragraph styling (e.g. line spacing), then I think you still need to do that another way (ms:FRT-s|mt1
, if I remember correctly). The USFM standard is silent about whether milestones ought to be able to change paragraph styles.
A newer option (and another one that’s not explicitly mentioned within the USFM standard), is to use a categorized paragraph style. but this will also work:
\mt1 \cat big\cat* Big version of title
Styling for this would be applied to a paragraph style for cat:big|mt1
If you use a local style file, you can just include:
\Marker cat:big|mt1
\FontSize 36
All other properties will be inherited from the normal mt1
style.