This is my biggest feature request also. The one thing i am really missing.
I’d take a look at octarine.
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I thought we were trying help improve Lettera 
I’ll check it out though, thanks!
No doubt, I am debating whether lettera alone would meet my needs, but octarine is a nice in between.
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Would be nice to select the file extensions that will be displayed in the file navigation sidebar, such as hiding html files or displaying hidden files such as those in .claude: Allow user to set the file types to be shown in file navigator sidebar
Isn’t the point of this to have a single folder as a workspace, one that doesn’t contain all your files? If within that folder you have lots of files, you can put them in subfolders.
Three workflows where this would make a real difference:
Workflow A — Slide decks
- I author slides as a
.mdfile - I export an
.htmlversion for presenting - Both show up identically in the navigator — same display name, no extension — so there’s no way to tell them apart at a glance
Workflow B — AI/Claude workspace
- I use a Lettera directory as a workspace for Claude to read and search through (previous writing, fetched docs, etc.)
- I write
CLAUDE.mdandSKILL.mdfiles inside.claude/— config files I actively need to edit - But dotfolders are hidden, so I can’t reach them from the navigator at all
Workflow C — Image attachments
- I drag images into
.mdfiles - They accumulate in the directory root, and moving them into a subdirectory breaks the references in the
.mdfile — so the clutter is effectively permanent within Lettera
In each case, the folder is the right home for these files. They just shouldn’t all compete for space in the navigator. Filtering by extension — or toggling visibility of dotfiles and derived files — would let navigation stay focused on what’s actually a note.
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Thanks for the suggestion @Brelaine
I played with it a bit and I agree it is quite nice. I tried many similar apps, IMHO Octarine certainly stands out. I still need to test it for a while longer though, the jury is still out. : )
Yes! Today’s release included typography settings.
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AI agents often emit markdown files with a particular max line width, for example, 105 characters per line.
The wrapping makes these files read more nicely in code editors, but can look really ugly in Lettera, which respects the line breaks in the original text but also introduces its own wrapping.
I would love for there to be a page width control (eg. in ems) so that these files would show up nicely by default. There might also be a better solution, such as just bumping up the default width, or recognizing when this kind of wrapping is occurring in a file and auto-adjusting for it somehow.
Example:
For comparison, here’s the same paragraph in a code editor:
