Layer
Explorer
The
Layer Explorer area of the Main Window shows all layers selected by the
menu Project >
Add
Layer.... To draw one or more layer at the Map Display, check
its box and reach (pincel).
The Spatial Reference System of the Map Display
will be
the first valid SRID among the layers checked an its is showed
at the status bar. It is also
possible
to set the Map Display SRID by right-clicking over
the Map Display area
as explained here. To find out
the layer-SRID, right-click over a
layer name and
choose Properties.... More actions
over layers will be explained here and via Layer and Map
Display Menus.
NOTE: Each layer
can be in one of the 4 status:
Some actions at the Layer Explorer and at the Map Display depends
on the layer status. Keep this in mind from now on and see how to
select one or more layers at the Layer Explorer below.
Layer
Explorer - Selecting
one or more layers
Clicking over a layer
name makes it selected and the
actions available
from the context menu can be executed.
Right-clicking over a
layer name makes it selected and shows
a context
menu of actions that can be executed over a layer. Those actions are
also accessible through the Layer Menu.
Shift+clicking allows
to select a consecutive set of
layers by clicking over the first and the last layer names in
the
tree. A highlighted area appear in the tree and right-clicking
over
this area shows a
context
menu of actions that can
be executed over more than one
layer, for example Remove
Layer(s).
Ctrl+clicking
allows to select a non-consecutive set of layer by clicking over
layer names in the
tree.
All layer names will became highlighted and right-clicking over
one of
them shows a context
menu of actions that
can be executed over all selected layer.
Note that the
layer does not need to have its box-checked to execute some actions.
For example, to execute Remove Layer, Show
Table or Classification...
it is enough to select a layer. All layer actions can also be
accessed via Layer Menu.