How to purge QMainWindow's geometry tag in Qt Designer UI files

Qt Designer adds a geometry tag that contains the widget's default size in absolute units (pixels).

This is really annoying because if you edit a ui file on a 4k monitor all of your uis will (by default) display with massive white space on a lower DPI system.

If I manually delete this tag, my windows have the expected size on first-show, but manually editing every ui file each time I open them in Qt Designer feels wrong.

I'm using Qt 5.9.

What's the paradigmatic way to prevent Qt Designer from adding this XML tag?

In example.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Example</class>
 <widget class="QMainWindow" name="Example">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>970</width>
    <height>1371</height>
   </rect>
  </property>

Solution

I am able to remove the geometry tags in Qt Designer like this:

Open a new Main Window form
Select geometry in the Property Editor
Click the red arrow on the right

This will automatically resize the form - but manually resizing it won't reinstate the geometry tag. However, if the form has a menu-bar, it will also add a geometry tag for that. So select menubar in the Object Inspector and then repeat steps 2 and 3 above. After doing that, I get this output:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget"/>
  <widget class="QMenuBar" name="menubar"/>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

And after adding other widgets/menus/layouts and resizing the form, the geometry tags never reappear. This was all tested using Qt Designer 5.10.1 on Linux.