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#!CDarkGreen #!N  #!Rall30 
Specifying inputs: arcs and icons #!N #!EC #!N #!N A visual 
program is a "network" of interconnected tool modules. In the VPE 
window, this network is represented as a set of tool icons 
connected to one another by lines ("arcs") representing the data ( 
 #!Lvpwndw4,dxall6 f Figure 4  #!EL  in Tutorial I shows such a network.) #!N #!I0 #!N 
#!N #!I0 #!N  #!F-adobe-times-bold-r-normal--18*   Connecting tool icons with arcs #!EF #!I50 
#!N #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 1. Position 
the cursor on an output tab of an icon and hold 
down the left mouse button: the cursor becomes a downward-pointing arrow, 
and a parameter or data name for that tab appears on 
the icon. #!N #!I30 #!N 2. Drag the cursor to another 
icon: the output tab remains connected to the cursor by a 
highlighted line (arc). If the connection is valid, the input tab(s) 
will be highlighted when the cursor arrow touches the icon. (If 
the connection is invalid, the tab(s) will not be highlighted, and 
an error message will appear. #!N #!I30 #!N 3. Release the 
mouse button to establish a connection to a valid input tab. 
#!N #!N #!I0 #!N Notes: #!N #!I30 #!N a. If the 
"receiving" icon has two or more valid input tabs, if you 
release the mouse button when the cursor is on the main 
part of the icon, the connection to the first (leftmost) tab 
is automatic. To establish a connection to a different tab requires 
placing the cursor on that tab before releasing the mouse button. 
#!N #!I30 #!N b. You can establish a connection starting with 
an input tab and dragging the arc to an output tab. 
#!I0 #!N #!N #!N #!I0 #!N #!EF #!N #!N #!I0 #!N 
 #!F-adobe-times-bold-r-normal--18*   Disconnecting or moving an arc #!EF #!I50 #!N Click on 
the input tab to which the arc is connected (e.g., the 
input tab on Sequencer): a highlighted arc, connected to an (Import) 
output tab appears: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 
o Disconnect the arc by dragging the cursor to an empty 
spot in the canvas and releasing the mouse button,  #!F-adobe-times-medium-i-normal--18*   or 
#!EF #!N #!I30 #!N o Move the arc by dragging it 
to another icon and releasing the mouse button to establish the 
new connection. #!N #!I0 #!N #!EF #!N #!I0 #!N #!N #!N 
#!N #!N  #!F-adobe-times-medium-i-normal--18*   Next Topic #!EF #!N #!N  #!Lall31,dxall32 h Deleting a tool icon  #!EL  #!N  #!F-adobe-times-medium-i-normal--18*   
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