aseprite/data/widgets/timeline_conf.xml

<!-- Aseprite -->
<!-- Copyright (C) 2014-2018 by David Capello -->
<gui>
<vbox id="timeline_conf">
  <hbox>
    <vbox>
      <separator cell_hspan="2" text="@.position" left="true" horizontal="true" />
      <hbox>
	<buttonset columns="2" id="position">
	  <item text="@.left" />
	  <item text="@.right" />
	  <item text="@.bottom" hspan="2" />
	</buttonset>
      </hbox>
    </vbox>
    <vbox>
      <separator text="@.frame_header" left="true" horizontal="true" />
      <hbox>
	<label text="@.first_frame" />
	<expr id="first_frame" />
      </hbox>

      <hbox>
	<check id="thumb_enabled" text="@.thumbnails" horizontal="true" />
	<separator id="thumb_h_separator" horizontal="true" expansive="true" />
      </hbox>
      <grid columns="2" id="thumb_box">
	<label text="@.thumbnail_size" />
	<slider min="1" max="10" id="zoom" cell_align="horizontal" width="128" />

	<check id="thumb_overlay_enabled" text="@.overlay_size"/>
	<slider min="2" max="10" id="thumb_overlay_size" cell_align="horizontal" width="128" />
      </grid>
    </vbox>
  </hbox>

  <separator text="@.onion_skin" left="true" horizontal="true" />
  <grid columns="2">
    <hbox cell_hspan="2">
      <radio group="1" text="@.merge_frames" id="merge" />
      <radio group="1" text="@.red_blue_tint" id="tint" />
      <button id="reset_onionskin" text="@.reset" minwidth="60" />
    </hbox>

    <label text="@.opacity" />
    <slider min="0" max="255" id="opacity" cell_align="horizontal" width="128" />

    <label text="@.opacity_step" />
    <slider min="0" max="255" id="opacity_step" cell_align="horizontal" width="128" />

    <check id="loop_tag" text="@.loop_tags" cell_hspan="2" />
    <check id="current_layer" text="@.current_layer" cell_hspan="2" />
    <hbox cell_hspan="2">
      <radio group="2" text="@.behind_sprite" id="behind" tooltip="@.behind_sprite_toolip" tooltip_dir="top" />
      <radio group="2" text="@.in_front" id="infront" tooltip="@.in_front_toolip" />
    </hbox>
  </grid>
</vbox>
</gui>