There's already an enhancement in the works to allow copy/paste of only values to prevent overriding cell formatting and validation rules. I've found several approaches to work around this limitation, but I have not found any way to do the same thing when using the Range fillFrom method.
If I specify column-level formatting and validation, the default fillFrom works when filling vertically, but it overwrites other column rules when filling horizontally. Are there any similar workarounds for fillFrom like there are for copy/paste?