Power Query keeps refreshing from Snowflake data source

[Feldon]

I am a Power BI Desktop newbie.  I am bringing data from Snowflake into Power Query in Import mode, and then adding various transform steps (replace values, add columns, etc.).  Every time I make a change to a step, Power Query refreshes and re-Imports the data from Snowflake again.  It takes forever to make a small number of changes, because I have to wait for the refresh from Snowflake every time.  I just want it to import the data once, and then edit the remainder of the query. 

I saw options for adjusting how often data refreshes, but that just seems to turn off Power Query previews.

Any suggestions?

[ppm1]

It is a good practice to uncheck the "Allow background refresh" option, but another is to add a Keep Rows step early in your query to limit the # of rows while you are building. Once all your transformations look good, you can delete that step and load all the data.

Pat