How can I use the multitouch feature on WebClient Ui?

There are two ways to enable multi touch on Web Client UIs.

First option:
To use the touch or multi touch functionality on Web Client UI the server project config has to contain [ui] usesTouchScreen = 1 as well.
Afterwards the project shall be downloaded to the client host by the Web Client functionality.

Note: This option is the preferred way!

Second option:
Another option for touch or multi touch functionality can be achieved by an additional parameter within the server side file webclient_index.html:
<param name="arguments" value="-touch">
If there is any unexpected behavior during touch operations, please use the config entry above.