Skil LL932301 Guide D'utilisation page 16

When the tool is moved relative to the target surface, the lengths
and scales of the cross line lasers will vary with the straight distance
from the tool to the target surface and will be enlarged when the
straight distance is increased. (FIG.5)
Fig. 5
NOTE: To ensure that the scales of the cross line lasers are
equidistant in both self-leveling and manual leveling modes, aim the
cross line lasers onto the target surface vertically; otherwise they
will not be equidistant. (FIG.6)
Fig. 6
Target Surface
No
"Yes"- equidistantly
"No"-un-equidistantly
NOTE: Keep the tool to within ±4° from horizontal in the self-leveling
mode, otherwise the laser line will blink.
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Target Surface
Yes No
Target Surface
No
Yes
No