168 ;;Quote: any accessible object should be easily observed and manipulated

168 ;;Quote: a bitmap display uses a block of bits to turn on and off pixels on the screen

168 ;;Quote: a Smalltalk 'Form' has height, width, and a bitmap of some image

172 ;;Quote: the BitBlt copy operation transfers a bits in a source form to a destination

172 ;;Quote: BitBlt includes a clipping rectangle to restrict the display to a rectangle

174 ;;Quote: BitBlt has a halftoneForm to fill an area with a regular pattern

176 ;;Quote: BitBlt allows pixels from the source and destination to be combined in any way, e.g., paint under with an 'or'

180 ;;Quote: Smalltalk displays text by BitBlt from a font form containing the character glyphs

182 ;;Quote: in Smalltalk, measure a line for cursor tracking by printing it with the 'printing' flag false; easier to maintain and optimize

188 ;;Quote: magnify a bit image by slicing into vertical strings, smearing the bits by ORing, and doing the same for horizontal strings

188 ;;Quote: can use BitBlt to rotate an image

192 ;;Quote: BitBlt is crucial to Smalltalk's user interface; need to optimize its performance