Unicode: 2285. Alias: Esc !sup Esc. Infix set relation operator. x ⊅ y is by default interpreted as NotSuperset[x,y].
Unicode: 220B. Alias: Esc mem Esc. Infix set relation operator. x ∋ y is by default interpreted as ReverseElement[x,y]. Not the same as \[SuchThat].
Unicode: 2291. Infix set relation operator. x ⊑ y is by default interpreted as SquareSubsetEqual[x,y].
Unicode: 228F. Infix set relation operator. x ⊏ y is by default interpreted as SquareSubset[x,y]. Used in computer science to indicate that x is a substring occurring at the ...
Unicode: 2292. Infix set relation operator. x ⊒ y is by default interpreted as SquareSupersetEqual[x,y].
Unicode: 2290. Infix set relation operator. x ⊐ y is by default interpreted as SquareSuperset[x,y]. Used in computer science to indicate that x is a substring occurring at ...
Unicode: 2286. Alias: Esc sub= Esc. Infix set relation operator. x ⊆ y is by default interpreted as SubsetEqual[x,y].
Unicode: 2287. Alias: Esc sup= Esc. Infix set relation operator. x ⊇ y is by default interpreted as SupersetEqual[x,y].
"BackgroundDialog" is a front end token that opens the Color dialog to set the background color for selected cells or text.
"ClearCellOptions" is a front end token that removes all explicit option settings for a cell.