i-tec Thunderbolt 3 Travel Dual 4K Display Dock Mode D'emploi page 17

Manual EN
Mirror mode: This mode can only be used if supported by the Mac.
Click on Gather Windows: using this option you can choose the settings of
the corresponding monitor – Scaled (offers available resolutions), Rotation
(Standard, 90°, 180° and 270°) and Refresh rate (if offered). Below the following
setting options are displayed. This may vary, depending on your monitor.
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