Before you can open a popup window, you have to create it. Like main windows and docked windows, popup windows are simply windows that have specific settings. In particular, popup windows are floating windows that are not set to start maximized. In the Designer, when adding a new window, selecting the popup window option creates a window with these presets. Once you have your popup window created, you can make it as big or small as you want. You can also set properties in the Property Editor to make it closeable, resizable, change the title, and display the title bar and border in the window.
In any window, you can add a script to any component to open your popup. This is easiest to do from a component like a button on the main window using the Navigation Script Builder. Simply select the Open action and the window that you want to open. Clicking on the button will then open the popup window that was selected. Alternately, you can use one of the many scripting functions that open a window.
There are a few properties of the Window that are useful to popups.
The Layer property of windows controls the z-order of the windows. Windows with a higher Layer will always be on top of windows with a lower Layer, regardless of which window is in focus. This is useful for keeping popup windows at the forefront. By default, all windows have a Layer of 0, but we can change this so that popups always remain on top. If popups have a layer that is the same as the main window, clicking on your main window makes it look like the popup window disappears, but it’s actually behind your main window. The Windows Menu will show you all the open windows in your Client, with the popup still being open.
The Layer property is located on the window object itself, in the Property Editor. Simply set it to a higher value so that the popup is always on top.
Popup windows can also be given a specific location to open up at, when the not being automatically centered by the script. In the Vision Property Editor, go to Layout > Location and provide a specific X and Y position (in pixels).
When opening a popup window to a specific location, ensure the Open and Center option is unchecked so that it doesn't override the location coordinates.