Solution 28150: Making the Scratchpad and New Documents Have the Same Settings on the TI-Nspire™ Family Handheld Units.
How do I set my scratchpad and other documents with same settings?To change the mode settings and make them apply to the Scratchpad as well:
• Press [home]  .
• Change the mode setting. For example, change the "Calculation Mode" setting to "Approximate."
• Press the [tab] key to move down to "Make Default" and press [enter].
Please see the TI-Nspire family guidebooks for additional information.