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<html>
<head>
<title>EAGLE Help: DELETE</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>DELETE</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Deletes objects and elements.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>DELETE *..</tt><br>
<tt>DELETE SIGNALS</tt>
<p>
<dt>
<b>Mouse</b>
<dd>
Right button deletes the group.
<p>
<dt>
<b>Keyboard</b>
<dd>
<tt>Shift</tt> deletes higher level object (see note).<br>
<tt>Ctrl</tt> deletes a wire joint.
<p>
</dl>
<b>See also</b> <a href=81.htm>RIPUP</a>,
<a href=42.htm>DRC</a>,
<a href=49.htm>GROUP</a>
<p>
The DELETE command is used to delete the object selected by the mouse.
<p>
Clicking the right mouse button deletes a previously defined
<a href=49.htm>GROUP</a>.
<p>
After deleting a group it is possible that airwires which have been newly
created due to the removal of a component may be "left over", because
they have not been part of the original group. In such a case you should
re-calculate the airwires with the <a href=75.htm>RATSNEST</a>
command.
<p>
With active <a href=321.htm>Forward&Back Annotation</a>, no wires
or vias can be deleted from a signal that is connected to components in a board.
Also, no components can be deleted that have signals connected to them.
Modifications like these have to be done in the schematic.
<p>
Use the <a href=81.htm>RIPUP</a> command to convert an already
routed connection back into an airwire.
<p>
The DELETE command has no effect on layers that are not visible (refer
to DISPLAY).
<p>
The DRC might generate error polygons which can only be deleted
with DRC CLEAR.
<p>
<b>Deleting Wire Joints</b>
<p>
If the DELETE command, with the <tt>Ctrl</tt> key pressed, is applied to the joining
point of two wires, these wires are combined to form one straight wire.
For this to work the two wires must be in the same layer and have the same width
and line style, and must both have round endings (in case of arcs).
<p>
<b>Deleting Polygon Corners</b>
<p>
The DELETE command deletes one corner at a time from a polygon. The
whole polygon is deleted if there are only three corners left.
<p>
<b>Deleting Components</b>
<p>
Components can be deleted only if the tOrigins layer (or bOrigins with
mirrored components) is visible and if (with active
<a href=321.htm>Forward&Back Annotation</a>) no signals are
connected to
the component (see also <a href=80.htm>REPLACE</a>).
Please note that an element may appear to be not connected (no airwires
or wires leading to any of it's pads), while in fact it <b>is</b>
connected to a supply voltage through an implicit power pin. In such a case
you can only delete the corresponding part in the schematic.
<p>
<b>Deleting Junctions, Nets, and Buses</b>
<p>
The following rules apply:
<ul>
<li>If a bus is split into two parts, both keep the initial name.
<li>If a net is split into two parts, the larger one keeps the initial
name while the smaller one gets a new (generated) name.
<li>After the DELETE command, labels belong to the segment next to them.
<li>If a junction point is deleted, the net is separated at this location.
Please check the names of the segments with the SHOW command.
</ul>
<b>Deleting Supply Symbols</b>
<p>
If the last supply symbol of a given type is deleted from a net segment
that has the same name as the deleted supply pin, that segment is given
a newly generated name (if there are no other supply symbols still
attached to that segment) or the name of one of the remaining supply symbols.
<p>
<b>Deleting Signals</b>
<p>
If you select wires (tracks) or vias belonging to a signal with the DELETE
command three cases have to be considered:
<ul>
<li>The signal is split into two parts. EAGLE will generate a new name
for the smaller part of the signal and keep the previous name for
the larger one.
<li>The signal is deleted from one end. The remaining part of the signal
will keep the previous name.
<li>The signal had only one airwire. It will be deleted completely
and its name won't exist any longer.
</ul>
After wires or vias have been deleted from a signal which contains
polygons, all polygons belong to the signal keeping the original name
(usually the bigger part).
<p>
<b>Deleting higher level objects</b>
<p>
If the <tt>Shift</tt> key is pressed when clicking on an object, the object
that is hierarchically above the selected one will be deleted. This applies
to the following objects:
<p>
<table>
<tr><td valign=top><font face=Helvetica,Arial><tt>Gate</tt> </font></td><td valign=top><font face=Helvetica,Arial>Deletes the entire part containing this gate (even if the gates are spread over several sheets). If f/b annotation is active, the wires connected to the element in the board will not be ripped up (as opposed to deleting a single gate), except for those cases where a pin of the deleted part is only connected directly to one single other pin and no net wire</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>Polygon Wire</tt> </font></td><td valign=top><font face=Helvetica,Arial>Deletes the entire polygon</font></td></tr>
<tr><td valign=top><font face=Helvetica,Arial><tt>Net/Bus Wire</tt> </font></td><td valign=top><font face=Helvetica,Arial>Deletes the entire net or bus segment</font></td></tr>
</table>
<p>
<b>Deleting all Signals</b>
<p>
DELETE SIGNALS can be used to delete all signals on a board. This
is useful if you want to read a new or changed netlist (see EXPORT).
Only those signals are deleted which are connected to pads.
<p>
Don't forget: Deleting can be reversed by the
<a href=94.htm>UNDO</a> command!
<hr>
<table width=100% cellspacing=0 border=0><tr><td align=left><font face=Helvetica,Arial>
<a href=index.htm>Index</a>
</font></td><td align=right><font face=Helvetica,Arial size=-1>
<i>Copyright © 2005 CadSoft Computer GmbH</i>
</font></td></tr></table>
<hr>
</font>
</body>
</html>
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