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A vertical stroke or hash instructing that a space be added.
Also known as: Add space, Space mark, Hash mark on a proof
A hash or a vertical stroke marking where a space belongs. The counterpart of the close-up mark, and the two are frequently combined on one proof to redistribute spacing across a line.
A vertical stroke in the text with a hash or space symbol in the margin, instructing that a space be inserted at that point.
British and American conventions differ in the marginal symbol used: BS 5261 specifies a distinct space sign where American practice commonly uses a hash.
One of several marks where the two traditions diverge.
A single vertical stroke written between two characters, with a hash of two crossing pairs of lines in the margin.
One opens a space and the other closes one.