Filters the trade skill listing by whether the player can gain skill ranks from each recipe. The default UI does not provide controls for this filter, but it can nonetheless be used to alter the contents of the trade skill recipe listing.
See also Tradeskill functions.
Signature:
TradeSkillOnlyShowSkillUps(filter)
Arguments:
filter- True to filter the recipe listing to show only recipes which the player can gain skill ranks by performing; false to show all recipes (boolean)