selection

Select elements by:

clicking on them
- «left-click» - select the element
- «Shift» + «left-click» - add the element to the current selection
using the rectangular selection boxes - «left-click» + «drag»

There are more options for selecting elements:

graph selection group
mouse-drawn polygon selection
mouse-move selection (with the left mouse button held down)

Graph selection group

Prefix: All operations require pressing «S» to enter the graph selection mode

action	binding
Select neighbors	«n»
Select predecessors	«p»
Select ancestors	«a»
Select successors	«s»
Select descendants	«d»
select reachable	«r»
Select all connected	«c»

.---------------------------------------------------------.
|                   all connected nodes                   |
|---------------------------------------------------------|
|             .----------.       .-----------.            |
|             | ancestor |---.---| reachable |            |
|             '----------'   |   '-----------'            |
|                            |                            |
|                            |                            |
|                            v                            |
|                .----------------------.                 |
|        .-------| predecessor-neighbor |                 |
|        |       '----------------------'                 |
|        |                  |                             |
|        v                  v                             |
| .-----------.          .------.                         |
| |    not    |  .-------| node |--------.                |
| | reachable |  |       '------'        |                |
| '-----------'  |                       |                |
|                v                       v                |
|     .--------------------.  .--------------------.      |
|     | successor-neighbor |  | successor-neighbor |      |
|     '--------------------'  '--------------------'      |
|                |                       |                |
|                v                       v                |
|         .------------.          .-----------.           |
|         | descendant |          | reachable |           |
|         '------------'          '-----------'           |
'---------------------------------------------------------'

Polygon and Mouse-move selection mode

Entering and exiting selection mode

Prefix: All operations require pressing «s» to enter the selection mode

action	binding
Enter selection mode	`<<s>>`
Exit selection mode	`<<Escape>>` and `<<<s>>>`
Toggle selection and deselection	`<<<e>>>`
Select motion	`<<<mouse_motion>>>`
Select mouse click	`<<<mouse_left_button>>>`
Enter the polygon selection operation group	`<<<x>>>`

Polygon selection operation group operation collection:

action	binding
Exit polygon selection mode	`<<<Escape>>>` and `<<<x>>>`
Polygon select motion	`<<<mouse_motion>>>`
Polygon deselect motion	`<<<Ctrl-mouse_motion>>>`

Operation after entering selection mode

Common selection operation example:

selection_basic

Operation after entering polygon selection mode

selection situation.
deselection situation.

selection_polygon