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See the .... setting #Web Client Settings for more info on using enabling/disabling anchors.
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As browsers where share session information between all their tabs and windows, it's not possible the run multiple Web Clients hosted from the same application server within the same browser
Through the Servoy Admin page, several settings are exposed related to Web Clients. These settings can be found on the Servoy Server Home > Web Client Settings. For more information on the specific settings see Web Client Settings