# Building a custom app into Legato

**URL:** <https://forum.legato.io/t/building-a-custom-app-into-legato/6450>\
**Category:** Legato Application Framework\
**Created:** [March 3, 2023, 3:58pm UTC](https://forum.legato.io/t/building-a-custom-app-into-legato/6450 "2023-03-03T15:58:34Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [March 3, 2023, 4:00pm UTC](https://forum.legato.io/t/building-a-custom-app-into-legato/6450/2 "2023-03-03T16:00:08Z")

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you can see here to modify wifi.sdef:

> [@Flash size wp7607](https://forum.legato.io/t/flash-size-wp7607/3805/35):
>
> you can go to legato-19.02.0/modules/WiFi/wifi.sdef, under “apps:” section, add e.g. $LEGATO\_ROOT/apps/sample/helloWorld/helloWorld.adef [image] Now the new app will be included in legato.cwe. Please also note that the max size for legato partition is 8MB.

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