As color reader, GM2000 suppport TXT, PDF, CHM, HTM, PDB, UMD formats, font change and TTS functions.

ENGADGET: Gemei outs GM2000 color screen-boasting e-reader

The font change was the subject of user complaints, many unhappy with the way updates were harder to read after Facebook decreased the font size without warning.

FORBES: New Facebook Profile Pages: Now With Smaller Font

But not everyone was unhappy with the font change.

FORBES: New Facebook Profile Pages: Now With Smaller Font

Content complying with XMDF format enables adapting to a change of font sizes without altering the content and picture layout.

ENGADGET: Sharp announces Galapagos e-reading tablets: 5.5 and 10.8 inches, getting e-bookstore in December

Reader can change the font size and the font.

FORBES: Apple. Tablet. Live.

One programmer has taken it upon himself to provide a fix for the change to bring the font size back to less-squinting normal.

FORBES: Is Facebook's New Font Size Too Small? Try Facebook Font Fixer

Largely, users have complained about the font now being too small, and Facebook introducing the change without warning.

FORBES: Facebook Uses Twitter To Address Smaller Font Size Complaints