Texas Instruments TI-84 PLUS SILV Guidebook - Page 139
Drawing Pixels, Erasing Points with Pt-Off, Changing Points with Pt-Change
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Erasing Points with Pt-Off( To erase (turn off) a drawn point on a graph, follow these steps. 1. Select 2:Pt-Off( (point off) from the DRAW POINTS menu. 2. Move the cursor to the point you want to erase. 3. Press Í to erase the point. To continue erasing points, repeat steps 2 and 3. To cancel Pt-Off(, press '. Changing Points with Pt-Change( To change (toggle on or off) a point on a graph, follow these steps. 1. Select 3:Pt-Change( (point change) from the DRAW POINTS menu. 2. Move the cursor to the point you want to change. 3. Press Í to change the point's on/off status. To continue changing points, repeat steps 2 and 3. To cancel Pt-Change(, press '. Drawing Points from the Home Screen or a Program Pt-On( (point on) turns on the point at (X=x,Y=y). Pt-Off( turns the point off. Pt-Change( toggles the point on or off. mark is optional; it determines the point's appearance; specify 1, 2, or 3, where: 1 = ¦ (dot; default) 2 = › (box) 3 = + (cross) Pt-On(x,y[,mark]) Pt-Off(x,y[,mark]) Pt-Change(x,y) Note: If you specified mark to turn on a point with Pt-On(, you must specify mark when you turn off the point with Pt-Off(. Pt-Change( does not have the mark option. Drawing Pixels TI-84 Plus Pixels A pixel is a square dot on the TI-84 Plus display. The Pxl- (pixel) instructions let you turn on, turn off, or reverse a pixel (dot) on the graph using the cursor. When you select a pixel instruction from Chapter 8: Draw Instructions 132