### Removed

The following GTV variables are removed:

- GTV%SLEEP: the real-time or delayed drawing status, but this functionality is removed.
- GTV%IMAGES[2,15]: size and memory address of the images stored in the metacode, for debugging purpose.
- GTV%IDENT: the number in Terminal Definition File of the device currently in use.
- the LUT array is removed: it was describing the hue values of the current Look-Up Table in use. But since the hue is not enough to describe a LUT (saturation and value are also needed), the two triplets (LUT%RED, LUT%GREEN, LUT%BLUE) or (LUT%HUE, LUT%SATURATION, LUT%VALUE) should now be used to get and set the Look-Up Table values.
- REXTR: the extrema (in plot_page units) of the last segment created in the metacode.
- REXTR_D: the extrema (in plot_page units) of the current working directory.