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In relational algebra, a selection (sometimes called a restriction in reference to E.F. Codd's 1970 paper [1] and not, contrary to a popular belief, to avoid confusion with SQL's use of SELECT, since Codd's article predates the existence of SQL) is a unary operation that denotes a subset of a relation.
Export cell range selection or a selected group of shapes (images) to PNG or JPG; The text/plain Unformatted text format results in unquoted/unescaped content as expected for external pastes; Added "Paste unformatted text" command; New command to select unprotected cells on protected or unprotected sheet; Lock symbol to mark protected sheet