Graphs in Vensim are, in general, automatically scaled and those scales are then divided up into a number of divisions. The Scaling tab of the Control Panel gives you some control over how that happens. You can also use this to control the appearance of the thumbnail graphs in SyntheSim mode.
Horizontal Divisions
Determines the number of divisions that a graph will have with vertical lines being used to separate these divisions (there will always be one less line than there are divisions). You can type a number or click on the down arrow to the right and select from the displayed choices. Note that changing the number of divisions does not change graphs you have already created, but will only affect new graphs.
Horizontal divisions applies to the Strip, Sensitivity and Bar graphs. For the Graph tool the default is to ignore this and set the number of horizontal divisions based on the values along the time axis. You can change this for the Graph tool, or by setting the number of horizontal divisions to -1 in the Custom Graphs.
| • | Add line at 0, if checked adds a horizontal line to graphs at the y-value of 1.0. This only happens on graphs that have scales running from a negative to a positive number. |
| • | Add line at 1, if checked, adds a horizontal line to graphs at the y-value of 1.0. |
Vertical Divisions
Determines the number of divisions to be made in the vertical axis of graphs using horizontal lines. This will change all graphical output except for Custom Graphs that have explicitly had the number of Vertical Divisions set. Again changing the number of divisions does not change graphs you have already created, but will only affect new graphs.
| • | Add line at special time, if checked, adds a vertical line at the location of special time. |
Vertical Scaling (Raw or Rounded) determines the appearance of the vertical scales on plots from the Strip and Graph tools.
| • | Raw. If scaling is set to Raw, the top value on the scale is the maximum value of the variable(s), the bottom the minimum. |
| • | Rounded. If scaling is set to Rounded, the numbers are rounded for easier reading. |
SyntheSim Settings
| • | Include 0, if checked, causes the thumbnail graphs always to include 0 regardless of the range of the variable. |
| • | Colorize, if checked, causes the thumbnail graphs to flash red to indicate increasing scale size and blue to indicate decreasing scale size. |
| • | No change on drag, if checked, causes the thumbnail graphs to retain their scale while sliders are dragged. When you release the mouse button the graphs will rescale. |
| • | Freeze, if checked, causes the thumbnail graphs to always retain their initial scale. To rescale them you need to change to another view and change back or load and unload a dataset from the Control Panel. |
| • | Buffer Mult specifies how much extra room to build in when the scales are expanding to accommodate future growth. The setting of two seems to work well. Setting this to a smaller number will case graphs to be rescaled more frequently, a larger number less frequently. |
