Apple Power Macintosh 4400 User Manual download pdf (Page 140)

You may have to raise your chair so your forearms and hands are at the

proper angle to the keyboard. If this makes it impossible to rest your feet

flat on the floor, you can use a footrest with adjustable height and tilt to

make up for any gap between the floor and your feet. Or you may lower

the desktop to eliminate the need for a footrest. Another option is to use a

desk with a keyboard tray that’s lower than the regular work surface.

m Position the mouse at the same height as your keyboard. Allow adequate

space to use the mouse comfortably.

m Arrange the monitor so the top of the screen is slightly below your eye

level when you’re sitting at the keyboard. The best distance from your eyes

to the screen is up to you, although most people seem to prefer 18 to 28

inches (45 to 70 cm).

m Position the computer to minimize glare and reflections on the screen from

overhead lights and windows.

Thighs horizontal

Shoulders relaxed

Screen positioned to avoid

reflected glare

Forearms and hands

in a straight line

Forearms level

or tilted up slightly

Lower back supported

Feet flat on the floor

Top of the screen at or slightly

below eye level (You may need

to adjust the height of your

monitor by placing something

under it or by raising your

work surface.)

Clearance under work surface

45–70 cm (18–28 in.)

140

Appendix A

1 ... 139 140 141 ... 205

No comments

Apple Power Macintosh 4400 User Manual Page 140