Data model elements won't stay put

Team,

After I neatly arrange all the tables which make up my data model...  within 'model' witin Power BI Desktop...  inevitably, after saving, shutting down, and re-opening my pbix file...  the graphical model gets scattered all over the desktop.  Like with Excel slicers, which allow one to flip a switch to keep it from moving around the worksheet...  I Do Not see that option for tables within 'model' within Power BI desktop.

Appreciate any insight into keeping things orderly within the graphical data model with Power BI Desktop.

Thank you!