TVG is a powerful utility program used to create neat, professional- looking view-graphs. A series of commands used to make a slide may be saved and re-used or modified. The commands are: BYE Logs you out of TVG, same as ^Z. CLEAR Clears all text and box definitions; the default values are unchanged. E Enter new text to be associated with the next available identifier. F [n] Plot final viewgraph on TTn:. MA [l] d Modify the alignment of TEXTl to d, where D = 0. (LEFT) AND D = 1. (RIGHT). MB l Draw up to 32 connected line segments. MC [l] n Modify the character set of TEXTl to n. MO [l] d Modify the orientation on TEXTl to d degrees. MP l Modify the position of TEXTl to that of the crosshair input. The alignment can also be chosen if either an L, C or R is typed to set point. MS [l] d Modify the size of TEXTl to d inches. MT l Replace TEXT l with new text. N n Place n ticks on right side during REDRAW. R Redraw with identifiers. S t Save as file named t. U t Unsave from file named t. where [l] is the tag letter identifier To generate a final viewgraph and copy, type: >TVG filename.ext Where "filename.ext" is the name of the file in which the viewgraph description is saved. (The default extension type is .TVG). On input to the program, the defaults are MA = 0., MC = 3, MO = 0. and MS = .25. See BEGIN for how to start TVG. See for details on that command. 3 START #BEGIN 3 BEGIN To initiate TVG, Type >TVG The screen of the plotting terminal will blank, bottom and side axes will be drawn, and the prompt TVG> will appear. Your first command will be either E to enter a line of text, or MB to modify (enter) a box or line segment shape An identifying tag letter (beginning with capital A) will be assigned to this entry. This tag identifier will be used in subsequent commands to refer to the entry. After either of these commands, the cross-hairs will become visible. For entry of text, position the cross-hairs where you would like the text, and type either L, R, or C (see HELP for the MP command for details). If you wish to see this entry, use the R command to re-draw the screen. The text string entered will be plotted. For entry of boxes or lines, position the cross-hairs at each point in the line or box, and type any character except C or E. (The space bar is useful here). Line segments will be produced between these points. Use C or E to terminate the entry. See HELP for MB for details. To enter additional text strings or figures, use the E or MB commands. You can change the default size, orientation, character set, or allignment by using the commands MS, MO, MC, or MA without specifying an identifying tag. All subsequent entries will have these characteristics. 3 BYE The BYE command (or ^Z) is used to terminate TVG. Before TVG exits, the question "Have you saved this? [Y,n]" will appear. To exit, type Y. To continue in TVG, type N. This question is designed to remind you to save your new or modified TVG file. 3 CLEAR The CLEAR command is used to wipe all text and box definitions, while remaining in TVG. Any default definitions that have been reset remain reset. 3 E E The E command is used to enter text. The next available tag identifier (beginning with capital A through lower-case z) will be assigned; and is used to reference that text in subsequent commands. (i.e., the MT B command is used to modify the text string tagged 'B'.) The default Hershey characteristics for entry are character set #3, orientation of 0 degrees with the X axis, left-justified allignment, and letter size of 0.25 inches. To change these characteristics, see the MC, MO, MA, and MS commands. For special characters and commands within a text line, see HELP MYLIB HERSHEY 3 F The F command is ued to draw the viewgraph in final form (without tags or axes). After the F command is used, typing a will cause the screen to blank, and the TVG> prompt to re-appear. 3 MA The command MA is used to modify the allignment of text strings. Allignment is defined as either 0. (left-justified) or 1. (right- justified). If the command is used with a specific tag identifier, MA B 1. only that string is re-alligned. If the command is used without an identifier, MA 1. the default allignment is changed. The initial default allignment is 0. 3 MB The command MB is used to enter a box or line segment shape. The command MB [l] is used to modify an existing box with the tag identifier l. After the MB command is used, the cross-hairs will appear on the screen. Position these at the first point of the box or line, and type any character except C or E (the space bar is useful here). Re-position the cross-hairs to the next point and type another character. The first line segment will appear on the screen. To terminate entry, type E (end of shape) or C (close box). If a C is typed, a line will be drawn between the current point and the initial point of the box or shape. 3 MC The command MC n is used to modity the default character set (#3). The command MC l n is used to modify the character set of an entry specific text string. For a description of the Hershey character sets available, see HELP MYLIB HCUSE. 3 MO The command MO a is used to modify the default orientation of text. The command MO l a is used to modify the orientation of the specified text string. The initial default orientation is 0. degrees with respect to the X-axis. If the MO command is used with a box, the line type is changed. 0 straight line 3 MP The command MP l is used to modify the position of a string or box. When MP is used, the cross-hairs will become visible. Position the crosshairs and type L to use this point as the lower left-hand corner of the text R to use this point as the lower right-hand corner of the text C to use this point as the center point of the text 3 MS The command MS s is used to modify the default lettering size. The command MS l s is used to modify the lettering size for the specific text string or box. The size s is entered in floating point inches. The initial default lettering size is 0.25 inches. 3 MT The command MT l is used to modify (replace) the text string specified by tag l. If MT l is used, that string is eliminated and the tag identifier released for re-use. 3 N The command N m is used to generate m tic marks along the right side of the graph when it ix next re-drawn. 3 R The R command is used to re-draw the graph with the latest modifications and additions included. The tic'ed axes are included, as well as the identifying tag letters associated with each string or figure. 3 S The command S fnam is used to save the current set of TVG commands as a file. The extension >TVG is automatically appended to the file name if an extension is not specified. TVG does not update the version number of the file, so if you are planning to use both the unmodified and modified versions of a file, make a copy before entering TVG. Once the file is saved, it may be recalled for modification by using the unsave command U fnam 3 U The command U fnam is used to read in a previously saved file of TVG commands. The extinsion .TVG is assumed if no extension is specified.