How do I access the context menu of IVIEWER an Android app?

I am using an Android app called iViewer on Nebula 10" and 21". I managed to install it but I can't access the iViewer setting/context menu to set its GUI options. I need to access the GUI options to let it know where to load the code. In previous Nebula version, I can access these options by bringing up the context menu. May I know how do I do that in this version of Nebula 10" or 21"?

Solution The iviewer has conflict with StarOS, you need to revert back Android default launcher (remove Staros launcher) by USB update the firmware! Please contact our sales for firmware of your tablet to update.
    • Related Articles

    • Android recovery

      We have an NEB 21.5” Android 5.1 tablet. Someone have created a unknown PIN on it, and we have to factory reset it. How do we do that ? Solution - you need to re-flash the tablet with Glory Star firmware. Please contact your account manager, there ...
    • Glory Star Nebula to Android default launcher

      Request for firmware update Per the instructions on your site for reverting our Glory Star Nebula to Android default launcher, we are requesting the firmware update required. We are aware that once we revert to Android, we could only revert back to ...
    • Firmware to revert to Android default launcher (remove Staros launcher)

      Date: September 7th, 2021 Device affected: NEB101/156/215 A firmware update can now be reverted to Android default launcher from the Staros launcher. Note that once the firmware has been updated to Android default launcher, you can only revert back ...
    • How to hide system toolbars with Glorystar Tablet

      Enclosed attachment contains instructions in how to hide system toolbars for your apps using Glorystar tablets. This is for android OS 5.1 and above and will work only for Glorystar tablets. 
    • How to OTA applications

      See enclosed attachment for procedure in how to do application OTA (Over the Air) update.