A checkbutton item is used to place a press button on the rollout that has two states, on and off, just like a check box. The user can click to successively switch between states. The syntax is:

checkbutton <name> [<caption>] [highlightColor:<color>] [toolTip:<string>] [checked:<boolean>] [images:<image_spec_array>]

The default alignment of checkbutton items is #center.


checkbutton setup "Setup" checked:true tooltip:"Opens setup panels"

on setup changed state do

if state == on

then openRollout setup_pan

else closeRollout setup_pan



Initial state of the check button, defaults to off.


The background color of the check button in its pressed (or on) state, defaults to a light-gray wash in keeping with 3ds Max user-interface conventions.


Provides text for a tooltip for the check button; no tooltip if unsupplied.


An image-specification array for providing bitmap images for the check button. If this is specified, the <label> is ignored and the contents of the check button are replaced with the bitmaps. The form is:

images:#(<image>, <maskImage>, <count_integer>, <enabled_out_image_index>, <enabled_in_image_index>, <disabled_out_image_index>, <disabled_in_image_index>)

where <image> and <maskImage> can be either a bitmap file-name string or a MAXScript bitmap value. <count_integer> specifies the number of sub-images in the bitmaps, and the image_index values specify which sub-image in the bitmaps is to be used for each of the four check button states.

For example:

bm1 = render camera:$cam01 outputSize:[80,60]


checkbutton foo images:#(bm1, undefined, 1, 1, 1, 1, 1)

would use a rendering as the check button image, and

checkbutton decay images:#("dcybtns.bmp", "dcymask.bmp", 6, 1, 4, 1, 4)

would use sub-images 1 and 4 of bitmaps dcybtns.bmp and dcymask.bmp for the out and in states of the check button, respectively.

See also Image Buttons.


<checkbutton>.checked Boolean

The state of the check button, on (true) or off (false).

<checkbutton>.state Boolean

Synonym for .checked

<checkbutton>.images Array

Sets the image-specification array for the check button. This property is write-only.

Setting the value to undefined will set the control back to displaying its caption rather than images in 3ds Max 8 and higher.

For example:

-- re-render, update button

bm1 = render()

foo.images = #(bm1, undefined, 1, 1, 1, 1, 1)

<checkbutton>.tooltip String

new.gif NEW in 3ds Max 9: Get/set the tooltip string of the checkbutton.

For example:

--Evaluate this script, then roll over the checkbutton to read the tootip.

--Check the checkbutton, roll over again to see the new tooltip.

--Uncheck the checkbutton and roll over once again to see the new tooltip.


rollout test "Test"


checkbutton chk_test "Check Me!" tooltip:"This is a tooltip"

on chk_test changed state do

chk_test.tooltip = if state then "I am checked!" else "I am unchecked!"


createDialog test



on <checkbutton> changed <arg> do <expr>

Called when the user clicks the check button to change its state. The <arg> argument will contain the new state of the check button, on (true) or off (false).


that <arg> is a local variable in the context of the event handler – you can use it inside the handler to act according to the new state of the checkbutton.

For example

utility testCheckButton "Test The CheckButton"


checkbutton myCheckButton "Check Me!"

-- theState is a user variable name that will contain the state

-- of the checkbox whenever the change handler is executed

on myCheckButton changed theState do


if theState == true then

myCheckButton.text = "Uncheck Me!"


myCheckButton.text = "Check Me!"


)--end utility


on <checkbutton> rightclick do <expr>

Called when the right mouse button is released over the button. Available in 3ds Max 8 and higher.

See also

Rollout User-Interface Items Common Properties

Rollout User-Interface Items Common Layout Parameters

Rollout User-Interface Control Types