What does this icon mean?

[Regiso]

Hello, Its COVID19 WFH and suddenly I am having trouble finding out what this icon means. Sorry it rotated .... can you point me to a visual glossary of official POWER BI icons so I can reference it when I have my next brain fog? Thank you so much

Contoso File from Definitive Guide to DAX

[edhans · Accepted solution]

That field is hidden from the report view creation. It is a good idea to do that to the "many" side of one-to-many relationships so you only use the field in the One side in your reports. You can hide/unhide fields easily in the Modeling view by right-clicking on them.