Known limits

What Superliner does not do today, in one list. Each item says what happens instead, where that is useful.

Scope: Mac only. Every limit here is a limit of this version.
Read-only: A workspace saved by a newer build, or one with damaged saved history, opens read-only.
Fixed numbers: The sizes and counts below are the current ceilings.

Writing and notes

Undo is kept in memory and is not saved in the workspace. It is empty when you open the workspace again.
Undo is refused while text is being composed with an input method. Finish the composition first.
Deleting a note for good does not erase copies that older saved history or backups still hold.
Delete Permanently and Empty Trash keep a note that a supertag, field or saved search uses. It stays in Trash, and so does a note a supertag's template made while its owner exists.
Built-in pages, and notes that are a supertag, field or saved search, cannot take a checkbox.
Indent and Outdent work on several notes only when they are consecutive siblings.
Move Note… cannot leave a reference behind when a selected note is itself a reference.
Formatting is not offered in a code note. Links inside a code block are not clickable.
Links keep only web addresses (http and https), mail addresses (mailto) and links to notes. Other addresses are dropped.
A heading or a divider cannot be set on a code note, and a heading cannot be set on a quote or a divider.
The numbers of a numbered list use a fixed size and do not follow the text size.

Paste as Reference works on notes copied from a selection. Text copied from inside a note pastes as text.
A code note takes pasted text as text, with its line breaks, and creates no notes from it.

A table has at most 64 columns and 2,000 rows. A note holds one table.
Cells hold text. They do not calculate.
The table in a note is not the Table view. Its rows are the note's own grid, not the notes below it.
A note longer than 45,000 characters, or with more than 1,000 lines, is shown in the code face but is not coloured.
A language saved by a newer build shows its name as stored and is drawn as plain text.
Spelling checks, automatic correction and text completion are off in a code block, and the inline triggers do not open in one.

A window has one second pane at most.
The Trash and Schema pages are built-in pages, and they do not take new notes.
Recents keeps the last 20 pages.
Nested notes in the Table view show only as a count beside the name, not as rows.
The Lanes view draws up to 20 lanes. The others are counted, and the page can be opened as an outline to see them all.
Each list in related content shows up to 50 notes, then a line says how many more there are.
A supertag's fields are on its page, not in the sidebar.

Removing a supertag from a note never removes a field value, a child or a note.
A supertag in Trash does nothing until you restore it. It is not listed in the sidebar or the browser meanwhile.
A supertag cannot extend itself or form a loop with its subtypes.
Defaults and starting values apply only when a supertag is applied. A change to them never reaches a note that already has the supertag.
Required is a warning in this version. Nothing blocks saving.
Placement changes only what shows. The values stay as they are. An inherited field is placed on the supertag that gives it.
A Text field holds plain text. Bold, italics and links are not offered in a field's value.
A Number accepts a plain number. Exponent notation such as 1e3 is not accepted.
A Tags or Option value can only name the field's own options.
A change to a field's type applies to every note that has the field. The count is shown before anything changes.
Clearing a value does not delete the field from the note.
Date ranges need a newer build. Older builds refuse a workspace that holds one.
Colours and pins are workspace settings, not note content.

Automations never delete a note. Their steps add or remove supertags, set field values and change checkboxes.
A supertag can have up to 20 triggers and 20 command buttons, and each rule up to 20 steps.
Command buttons cannot be renamed. Remove one and add it again to change its name.
A rule's steps cannot refer to a note. Note, list and Tags fields are not offered in Set field.
Automations do not run for Undo or Redo, for an import, or for the copies a template makes.
The Markdown copy writes each rule as a sentence. Edits to the Markdown copy are not read back.
A template is copied when the supertag is applied. Changes to it never reach existing notes.
One application copies at most 2,000 notes. A template that would copy more is refused whole.

A search with no conditions lists nothing.
The results of a saved search are not owned by it, so a result has no New Note and no Remove.
The palette's search covers the text of each note and the cells of its table.
Inline triggers need a space, the start of the text or opening punctuation before them. They do not open inside a link or a web address.

A workspace saved by a newer build, or one whose saved history is damaged, opens read-only. You can read, search and back it up, but nothing is saved and no Markdown files are written.
A workspace whose folder is read-only opens read-only, with a notice.
The Markdown copy is written for other tools to read. Changes made to it are not read back.
The app does not encrypt the notes in the workspace folder.
Keep one writer for each workspace folder. Do not edit the saved files by hand, and do not let a sync service write the folder from two Macs at once.
Attaching needs a workspace that is not read-only. A read-only workspace still shows and previews its files.
A file is not removed from the workspace folder while a note or saved history still names it. Moving a note to Trash does not delete its file at once.

Import reads OPML and Markdown. Pictures and attachments are not copied: an image becomes a link or its description.
A note keeps its created and edited times only when the source states them. Otherwise they start at the import.
Files are read with size and count limits. Links that lead outside the chosen folder are skipped.
Import is refused in a read-only workspace.

Superliner runs on the Mac only.
A workspace can be open in one copy of Superliner at a time.
While a workspace window is open, a menu-bar item and a system-wide shortcut open Quick Capture. Both are off until turned on in Settings ▸ General.