@
chaley - were the formats_modtimes/paths/sizes functions recently added, I can recall other posts asking for some way to get the sizes and file system dates.
	Quote:
	
	
		| 
					Originally Posted by chaley  Be aware that this kind of column can slow down calibre's GUI because the gui must look up the modtime of every book format. | 
	
 If I only display the custom column (s) in the Book Information panel (keyboard 'I') does that mean the file system look ups are only done if I press 'I'.
BR