If you frequently create files whose names vary from those of other files in the same folder by only a date, sequence number, or other small detail, you can accurately standardize file naming and save effort with this trick. When saving your file, click a grayed-out filename in the Save dialog’s list. That causes macOS to auto-fill the clicked name in the Save As field, where you can tweak it rather than typing a new name from scratch. Then you can click the Save button.
