Preferences › Guides & Grid › Gridline every and Subdivisions set the
grid of the documents that were open when either value changed, and of
no other document. A document made with File › New, or opened from a
file VectorCraft reads no grid from (SVG, PDF, EPS, .ai and the other
imported formats), got a 72 pt grid with 8 subdivisions, whatever the
preferences were set to. After a restart the saved values applied to no
document, because the desktop app restores the preferences at launch,
before any document is open.
file.new now gives a new document the preferences' grid, and
document.open, file.newFromTemplate and file.revert give it to a
document read from such a file. A native file, and the native document
that an SVG, PDF, .ai or EPS file carries, keep the grid they were
saved with. Changing either preference still sets the grid of every
open document.
Docs: docs/mcp.md (gridlineEvery, gridSubdivisions),
docs/target-app-parity.md.