## Commands

The CLASS commands dealing with the position of the spectrum are not affected by the renaming of the coordinate system, nor by the reordering of the variables. On the other hand, several commands are added or improved to fully benefit the new projection kinds and possible non-zero angle.

- MODIFY PROJECTION is added. It allows to modify the current R spectrum projection, including setting a new projection and a non-zero angle. It uses the GREG reprojection engines from any projection to another.

- MODIFY POSITION is now a shortcut for MODIFY PROJECTION, in the particular case when the projection system and angle are left unchanged. Thanks to this, it supports now any kind of projection.

- CONSISTENCY now checks in details the projection of all observations in index, i.e. the projection systems, centers, and angles.

- TABLE benefits the CONSISTENCY improvements, in both NEW or OLD modes. In the latter case, TABLE verifies that the appended spectra have a projection consistent with the old ones. The projection description of the spectra (including their angle) is saved in the table header.

- XY_MAP benefits the TABLE improvements, including the possible non-zero projection angle in the table header.