# Syntax and Hints for Processing
**URL:** https://discourse.processing.org/t/syntax-and-hints-for-processing/1904
**Category:** Coding Questions
**Created:** [July 19, 2018, 2:05pm UTC](https://discourse.processing.org/t/syntax-and-hints-for-processing/1904 "2018-07-19T14:05:52Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@abubakar](https://discourse.processing.org/u/abubakar)
#### Post date: [July 19, 2018, 2:05pm UTC](https://discourse.processing.org/t/syntax-and-hints-for-processing/1904/1 "2018-07-19T14:05:52Z")
I am new to Processing3, I am facing issues in finding the syntax of different commands in processing. e.g contour.
Can someone guide me how i can simply check if my contours are convex.
precisely how to use cv.isContourConvex() function
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### Author:  [@dan850](https://discourse.processing.org/u/dan850)
#### Post date: [July 19, 2018, 11:43pm UTC](https://discourse.processing.org/t/syntax-and-hints-for-processing/1904/2 "2018-07-19T23:43:26Z")
hi @abubakar have you tried pressing the key combination, Ctrl-Space?, the code completion dropdown menu should appear. So in your case, you would start typing ‘begin’ then if you press the key combination, the `beginContour()` command will be listed.
And once you create a function, `isContourConvex()`, the function will be listed in the code completion menu once you type `cv.`
Hope this helps.
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### Author:  [@kfrajer](https://discourse.processing.org/u/kfrajer)
#### Post date: [July 20, 2018, 1:13am UTC](https://discourse.processing.org/t/syntax-and-hints-for-processing/1904/3 "2018-07-20T01:13:25Z")
I will look up their documentation. You can find it here: [https://processing.org/reference/libraries/](https://processing.org/reference/libraries/) ok… it is just few clicks away.
Kf