# Unit 4, Lesson 13, Bubble 14
**URL:** https://forum.code.org/t/unit-4-lesson-13-bubble-14/25210
**Category:** CS Discoveries
**Tags:** csd-unit-4, csd-unit-4-lesson-13
**Created:** [March 1, 2019, 6:58pm UTC](https://forum.code.org/t/unit-4-lesson-13-bubble-14/25210 "2019-03-01T18:58:56Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mindyw](https://forum.code.org/u/mindyw)
#### Post date: [March 1, 2019, 6:58pm UTC](https://forum.code.org/t/unit-4-lesson-13-bubble-14/25210/1 "2019-03-01T18:58:56Z")
I have a student that is trying to “Run” her app in Design Mode, but before she can do anything but click on the “Run” button, it switches from her home\_screen to a different screen. It does the same thing in the Code screen. She hasn’t even done any of the block coding yet. Not sure if it’s a [code.org](http://code.org) glitch or what. Does anyone have any ideas?
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### Author:  [@ltoal](https://forum.code.org/u/ltoal)
#### Post date: [March 1, 2019, 10:22pm UTC](https://forum.code.org/t/unit-4-lesson-13-bubble-14/25210/2 "2019-03-01T22:22:01Z")
It’s possible a screen other than the one she’s called `home_screen` got set to be the main screen. Check to see if there’s a ‘Make default’ button on her home screen’s properties page - clicking that should make it be the first screen shown when the app is run.
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### Author:  [@bradleywellsashley](https://forum.code.org/u/bradleywellsashley)
#### Post date: [March 3, 2019, 6:21pm UTC](https://forum.code.org/t/unit-4-lesson-13-bubble-14/25210/3 "2019-03-03T18:21:08Z")
Mindy,
Just checking in - is the first thing you have when the app is run a `setScreen` block to the desired screen?
Brad