Texas Instruments TINSPIRE Teacher Software Guidebook - Page 471

As you move through the options, you can review the changes on the work area. For example, you can see the line weight for the selected object change from Thin to Medium as you preview the line weight options. Note: You can enter a numeric value instead of selecting an option to change an animation speed attribute for a supported object, or to set the step size, number of points, minimum values, or maximum values for supported graph types. 5. Press · to apply the option to the attribute. Locking measured values and points Locking measured values and points can be useful when you need to prevent inadvertent change, or for explorations in which object manipulations are constrained such that the locked measurement remains constant. 1. From the Actions menu, select Attributes. 2. Select the value or point that you want to lock. 3. Use 9 and : to locate the Lock attribute. 4. Use 7 or 8 to select Lock. Initial rectangle with locked perimeter 5. Click or press · to lock the value or point. A lock icon appears near the locked value or point. Graphs & Geometry 459