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A property of the SYSTEM built-in variable that defers the resizing and/or movement of controls until the end of the ACCEPT loop or SYSTEM{PROP:DeferMove} is reset to zero (0). This disables the immediate effect of all assignments to position and size properties, enabling the library to perform all moves at once (which eliminates temporarily overlapping controls). The absolute value of the number assigned to SYSTEM{PROP:DeferMove} defines the number of deferred moves for which space is pre-allocated (automatically expanded when necessary, but less efficient and may fail). Assigning a positive number automatically resets PROP:DeferMove to zero at the next ACCEPT, while a negative number leaves it set until explicitly reset to zero (0).

In multi-threaded applications, the setting of SYSTEM{PROP:DeferMove} to a non-zero value initiates the deferred move for the current thread only.

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PROP:DeferMove is ignored if [[prop lazydisplay.htm|PROP:LazyDisplay]] is set to zero (0).

**Example:**

**WinView WINDOW('View'),AT(0,0,320,200),MDI,MAX,HVSCROLL**

**         IMAGE(),AT(0,0,,),USE(?Image)**

**         BUTTON('New Picture'),AT(160,180,60,20),USE(?NewPic)**

**         BUTTON('Close'),AT(80,180,60,20),USE(?Close)**

**        END**

**FileName    STRING(64)                 !Filename variable**

**ImageWidth  SHORT**

**ImageHeight SHORT**

** CODE**

** OPEN(WinView)**

** DISABLE(?LastPic)**

** IF NOT FILEDIALOG('Choose File to View',FileName,'BitMap|*.BMP|PCX|*.PCX',0)**

**  RETURN                        !Return if no file chosen**

** END**

** ?Image{PROP:Text} = FileName**

** ACCEPT**

**  CASE ACCEPTED()**

**  OF ?NewPic**

**   IF NOT FILEDIALOG('Choose File to View',FileName,'BitMap|*.BMP|PCX|*.PCX',0)**

**    BREAK                       !Return if no file chosen**

**   END**

**   ?Image{PROP:Text} = FileName**

**   SYSTEM{PROP:DeferMove} = 4               !Defer move and resize **

**   ImageWidth = ?Image{PROP:Width}          !1 move**

**   ImageHeight = ?Image{PROP:Height}        !2 moves**

**   IF ImageWidth > 320**

**    ?Image{PROP:Width} = 320**

**    ?Image{PROP:XPos} = 0**

**   ELSE**

**    ?Image{PROP:XPos} = (320 - ImageWidth) / 2    !Center horizontally**

**   END**

**   IF ImageHeight > 180**

**    ?Image{PROP:Height} = 180**

**    ?Image{PROP:YPos} = 0**

**   ELSE**

**    ?Image{PROP:YPos} = (180 - ImageHeight) / 2   !Center vertically **

**   END**

**  OF ?Close**

**   BREAK**

**  END **

** END             !Moves and resizing happens at the end of the ACCEPT loop**