ems versus pixels

• From: Rowan Smith <rowan@absolutely.co.nz>
• Date: Tue, 1 Jan 2002 16:32:16 +1300
• To: <w3c-wai-gl@w3.org>
• Message-ID: <IMEDJHJFHLCBOPPFCIBEGENMCHAA.rowan@absolutely.co.nz>

Hi there

WAI Priority 3 guidelines (WCAG Checkpoint 3.4) recommend using relative
units rather than absolute. The Techniques document suggests that using ems
rather than pixels as a unit is a way of doing this even when using absolute
positioning.

OK, I can understand that for text specifications like font sizes and line
heights, but does it apply to positioning layers on a page using CSS? Is
there an accessibility downside of positioning layers (div tags) by using
px?

Thanks

Rowan

Received on Monday, 31 December 2001 22:33:13 UTC