Set size of points independent from map scale

What is the relationship between map scale and resolution?

Data resolution is the smallest difference between adjacent positions that can be recorded. Since a paper map is always the same size, its data resolution is tied to its scale. Resolution also limits the minimum size of feature that can be stored.

How do I set a reference scale in Arcmap?

Here are the steps in setting a reference scale:

1. Right-click the data frame in the table of contents and click Properties.
2. Click the General tab.
3. Type a value in the Reference Scale input box or choose a value from the drop-down list. Tip:
4. Click OK.
5. Alternatively, you can use the current map scale.

How do I fix scale in Qgis?

The scale of the map can be changed in the “Main Properties” under “Scale”. Set the scale at which the map is to be displayed in the canvas.