PHOTOSHOP: To resize with anti-alias, press CTRL+K (Options/Preferences) and change the option from Bicubic (Smoother) to Nearest Neighbour ^^
-Photoshop CS4: How to change the eraser mode to pencil?
In the tool bar at the top right next to the Brush options is the Mode button with the Pencil, Block and Brush choices for the type of erasing tool.
Photoshop Elements: Where is the pencil tool?
The pencil tool is nested with the brush tool, you can press 'N' to find it. Picture: [link]