Texas Instruments TI-80 User Manual - Page 107

DRAW DRAW Menu To display the DRAW DRAW menu, press 2 F. What happens when you select an item from this menu depends on whether or not a graph is displayed when you access the menu, as described under each operation. DRAW DRAW Menu DRAW POINTS 1: CLRDRAW Clears all drawn elements. 2: LINE( Draws a line between two points. 3: HORIZONTAL Draws a horizontal line. 4: VERTICAL Draws a vertical line. 5: DRAWF Draws a function. 6: SHADE_Y> Shades an area. 7: SHADE_Y< Shades an area. 8: SHADE( Shades an area. 9: GRIDON Turns the graph grid on. 0: GRIDOFF Turns the graph grid off. Before Drawing on a Graph Drawing on a Graph (See page 7-12 for an explanation of CLRDRAW.) Because Draw operations draw on top of the graph of currently selected functions, you may want to do one or more of the following before drawing on a graph: ¦ Change the mode settings. ¦ Enter or edit functions in the Y= list. ¦ Select or deselect functions in the Y= list. ¦ Change Window variable values. ¦ Turn STAT PLOTS on or off. ¦ Clear existing drawings with CLRDRAW (page 7-12). Draw operations can draw on FUNC and PARAM graphs. The coordinates for all Draw instructions are always the X-coordinate and Y-coordinate values of the display. You can use most of the operations from the DRAW DRAW and DRAW POINTS menus to draw directly on a graph, using the cursor to identify coordinates; or you can execute these instructions from the Home screen or a program. Draw Operations 7-3