The centerpiece of a Waveme diagram is its ruler.
Menu: Diagram | Ruler
Show or hide ruler(s) with
Menu: View | Show ruler
It is likely the first thing you'll define as you start working on a new diagram.
A ruler defines the number of drawing units, that a diagram contains, and the width of each unit in pixels.
The number of units in a ruler is the max. length that any waveform could have.
Auto-signal and Auto-bus waveforms are drawn for you to the full extent of the ruler. Changing the ruler width will also change the length of these waveforms.
Signal and Bus waveforms are drawn by you, segment by segment, by specifying the number of units of each waveform segment, until you have drawn along the entire ruler width.
If you later realize you need to draw longer waveforms, just increase the number of units in the ruler, to gain more drawing space.
You can also decrease the number of units in the ruler, when you realize you don't need so many of them, but only if no Signal or Bus waveform uses those extra units.
Auto-Signal and Auto-bus waveforms length is automatically adjusted to the ruler's width.
Whether and where a ruler is shown is under your control. You can select not to show the ruler, show it above all the waveforms (top ruler), below all the waveforms (bottom ruler), or both.
Thus, you have the option of using the ruler while drawing, and then hiding it in the final diagram.
Other ruler features you can configure:
Ruler position (Top, Bottom, Top & Bottom, Not shown)
Ruler configurations (font, color, count, spacing)