You can vote on the next map at the end of a match in casual matchmaking by using the console command "next_map_vote 0/1/2"

To vote for the first map put a 0, to vote for the second option put 1 and to vote for the third option put a 2.

For ease of use you can bind the keys in the console. If you want to bind the options to the numpad keys use these console commands:


This will make it so clicking numpad-1 will vote for the first, 2 for the second and 3 for the third option.

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Alternatively you could just use the fix-all button and then click on the vote you want:
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=258046134

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2578612593
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1421414406
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1421407265
(Click here to just look at every guide I've made.)