There are severalmarking operations, all accessed via the<g> key. Marked faces are drawn green, that's why the <g>

Figure 129. Marking

Figure 129 shows you what you get once you have hit the <g> key; a handy reference to the various operations towards the bottom of the window.

Marking Inside a Box - left-mouse

You can draw out a box by holding down the left mouse button while dragging the mouse. Let go of the mouse button and all faces inside the drawn box will be marked (see Figure 130). This includes faces that might be on the other side of the object, obscured behind the faces at the front. Hidden faces will not be marked.

Figure 130. Marking Inside a Box

Unmarking Inside a Box - right-mouse

Draw out a box using the right mouse button and all faces inside the box will be unmarked (see Figure 131).

Figure 131. Unmarking Inside a Box

Painting - <g> key

You can use the mouse pointer to mark faces in a more interactive way using the painting method. By typing <g> a second time you'll paint a single dot under the mouse pointer. Unlike the box selection method, only the faces you can see are marked; the painting doesn't go all the way through the object.

Figure 132. Painting

If you want to paint more than one dot, just hold down the <g> key and faces will be marked wherever you move the mouse pointer (see Figure 132). When you want to stop painting, let go of the <g> key.

If you want to unmark using the painting method, use <Shift-G> instead.

Brush radius - <b> key

You can change the size of the painting brush by typing <b>. You will be asked for the radius, in mm, of the circle shaped brush.

Filling - <f> key

To mark an area of unmarked faces in a flood fill fashion, move the mouse pointer into some part of that area (see left side Figure 133) and type <f>. The flood fill will not cross a boundary of already marked or hidden faces ( see right side Figure 133).

Figure 133. Filling

In Figure 133 the smile of the face has been extended to fully encircle the ankle, before filling, otherwise the whole leg would have been marked.

You can unmark using the flood fill method by just pointing the mouse pointer at an area of marked faces before filling.

Swapping - <s> key

To swap the marked and unmarked status of all visible faces, type <s> (see Figure 134).

Figure 134. After Swapping

Unmarking - <u> key

To unmark all visible faces, type <u>.