You can change the map your server uses by creating a custom command line, ticking the tick box next to "Starting Map" and then typing the map name from the map list below into the text field.
Make sure to save the custom command line and then select it.
TDM Maps (TeamDeathMatch)
PC-TheFalls
PC-Marsh
PC-ForgottenOutpost
PC-Transfer
PC-Verdant
PC-Contingency
PC-Docks
PC-Downpour (Non-Existant as of Date)
PC-ForestChasm also PC-ForestChasmSnow
PC-Snowbound
PC-Airbase
PC-UtilityBase also PC-UtilityBaseSnow
PC-SandstormValley
PC-DesertionPoint
PC-Borealis
PC-Pandoria
FR-Valley
FR-Island
FR-Seasons
FR-ForgottenWorld
PC-BasicTesting_dg
PC-FrontEndTest
AI-VisitorCenter
AI-Whiteforest
AI-Geothermal
GTTC-TheFalls
GTTC-Downpour
GTTC-Docks
GTTC-Ruthless (also GTTC-RuthlessSnow)
CTE-ForgottenOutpost