Clicking on the workshop enables switching between bow and crossbow production. The change takes effect at the next production cycle.
Workshops should be placed in high numbers for an extensive production capacity, as one or two may not be enough for the player's demands. Crossbows require more wood than bows and are made slower, however they are very valuable to sell.
It is recommended to build fletcher's workshops close to the stockpile and armoury for highest efficiency.