Question about HP OfficeJet Pro 9015

A4 is also Legal size.
Here are the others:

Media Sizes Supported:
Letter; Legal; Government Legal; Executive; Statement;
3 x 5 in; 4 x 6 in; 5 x 7 in; 13 x18 cm; 8 x 10 in;
10 x 15 cm; L; Photo 2L; Envelope( #10, Monarch, 5.5 bar);
Card (3 x 5in, 4 x 6 in, 5 x 8 in)

I use the one for A4 format and have not yet inserted
any other format.
You can set the drawer with the grid.