Occasionally, one of the dancers making the Arch also dances under it and so those making the Arch cannot Take Both hands; for example, in bars 1-8 of The Gypsy Shawl, the Arch is made by 1st and 2nd Men at one end of a long open-ended loop of dancers, all with Nearer hands joined, who retain the Hold as they all, except 1st Man, go under the Arch.
The moving dancers use the appropriate Travelling Step.
Where the dancers making the Arch are also moving, the following conventions identify which dancers make the Arch and which go under:
Men always make the Arch for Ladies;
in a Longwise or Square set, those going Up make the Arch;
in a Round the room set dance, such as The Dashing White Sergeant, it is convenient, and easy to remember, for those going anticlockwise to make the Arch (but note that it is not strictly correct to make Arches at all according to the RSCDS instructions for this dance);
Where none of these applies, as in bars 21-22 of Aird Of Coigach, the Dancing man, and the dancer with him, make the Arch.