Tools
Schedules stay on your device — opening a file never uploads anything.
Save writes back to the file you opened (Chromium browsers); otherwise it downloads a .json. Nothing leaves your device.
“Save as…” lets you choose a new name/location — that copy becomes your working file. “Download a copy” exports the .json without changing your current file.
Copies, printer and duplex are chosen in the print dialog. Keep Background graphics on there so bar colours and shading come through.
Shares the actual project .json so the recipient can open and edit it — not a review copy. Nothing is uploaded: it goes through your device’s share sheet, or downloads if sharing isn’t available.