A common problem when displaying plots with flow cytometry data is to display correct text in the axis titles. Depending on the instrument, and on the settings that were used during acquisition, the information might be stored in the Name keyword of the parameter in FCS file, or the Stain keyword.
In version 3, it was possible to change each plot individually - in the axis options formatting category, you had the ability to change from Name to Stain, or even Name + Stain, or Stain + Name.
In FCS Express Version 4, you can still make that change, but you only need to make it once - before the plot is opened. You can do this by clicking on the Application Button, then Edit Preferences. Then, click on Data Loading, and select the FCS Files category.
Then, change the value of Keyword to Use as Parameter Name.
You can read more information about setting up axes labels in our manual: