| Run: Clicking on the Run button starts Run mode. Run mode is the simulation mode in which currents flow and circuits work. Physics works. Run mode lasts until stopped. Clicking on Run always starts the clock (when visible). Though most circuits appear to function independent of time, the circuits in Current Electricity are actually time dependent. Batteries and power supplies gradually lose energy, capacitors rapidly discharge, and currents and bulb brightnesses change in response. The clock, when visible, records the time scales of these changes. In Run mode, you can operate switches (both single and double). You can also change the length of the nichrome (copper) wire and the resistance of the variable resistor. In Run mode, you cannot access the Standard Menu. In addition, all non-graphics elements and tools are not accessible (except as noted above). The only usable buttons are Stop, Realistic View, Schematic View and the graphics tools. In addition, you cannot access objects to move them or change their properties. With regard to the Graphics Palette, you can draw or place graphics objects and take snapshots. However, you cannot select, move or resize them. Exception: To open an object's Properties Boxes during Run mode, depress the Control key and click on the object. Also , if you select an object before entering Run mode, you can open is Properties Box during Run mode by typing control-O. This exception provides you with a limited capacity to change circuit characteristics in Run mode. For example, you could change the voltage of a DC power supply, the resistance of a bulb, or the material or thickness of a nichrome wire. Preselecting ammeters, voltmeters, or ohmmeters lets you change their scales without needing to stop the circuit simulation.