• Make the mini map and chat box disappear and re appear as needed.
    • This can't be done at the moment.
  • Make the quest titles much smaller so that they don't take up so much room.
    • You can reduce the overall size of the quest list UI element by opening the HUD editor, selecting the element and pressing CTRL+Home
  • Move or minimize the hot keys for skills to free up room.
    • Open the HUD editor, select the hotbar in question and hit CTRL+Home.
  • Turn off the UI but retain essential screen features.
    • I believe CTRL+Right-Click on an element while in the HUD Editor will hide that element. CTRL+Right-Click again to have it appear again.

    There are two rows 1-10?
    They are two separate rows with two separate hotkeys. You'll notice (especially if you increase the element's size with CTRL+Home) that one just shows "1", "2," "3," as shortcuts, while another would show "Ctrl 1" and so forth. You can edit these in the keymapping.

    was a option in the settings that opens a window
    I assume you're talking about the HUD editor. You can click and drag elements where you want them, then save it to keep pieces where you want.