aseprite/data/widgets/export_sprite_sheet.xml

<!-- ASEPRITE -->
<!-- Copyright (C) 2001-2015 by David Capello -->
<gui>
  <window id="export_sprite_sheet" text="Export Sprite Sheet">
  <grid columns="4">
    <label text="Sheet Type:" />
    <combobox id="sheet_type" cell_hspan="3" />

    <label id="columns_label" text="# of Columns:" />
    <entry id="columns" text="" maxsize="4" />
    <boxfiller cell_hspan="2" />

    <label id="rows_label" text="# of Rows:" />
    <entry id="rows" text="" maxsize="4" />
    <boxfiller cell_hspan="2" />

    <hbox />
    <vbox>
      <check id="padding_enabled" text="Padding" />
    </vbox>
    <grid columns="2" id="padding_container" cell_hspan="2">
      <label text="Border:" />
      <entry id="border_padding" text="0" maxsize="4" />
      <label text="Shape:" />
      <entry id="shape_padding" text="0" maxsize="4" />
      <label text="Inner:" />
      <entry id="inner_padding" text="0" maxsize="4" />
    </grid>

    <label id="fit_width_label" text="Width:" />
    <combobox id="fit_width" text="" maxsize="5" editable="true" />
    <label id="fit_height_label" text="Height:" />
    <combobox id="fit_height" text="" maxsize="5" editable="true" />

    <hbox id="best_fit_filler" />
    <check cell_hspan="3" id="best_fit" text="Best fit for texture" />

    <label text="Layers:" />
    <combobox id="layers" text="" cell_hspan="3" />

    <label text="Frames:" />
    <combobox id="frames" text="" cell_hspan="3" />

    <check id="image_enabled" text="Output File" />
    <button id="image_filename" cell_hspan="3" />

    <check id="data_enabled" text="JSON Data" />
    <button id="data_filename" cell_hspan="3" />

    <check id="open_generated" text="Open generated sprite sheet" cell_hspan="4" />

    <hbox cell_hspan="4">
      <boxfiller />
      <hbox homogeneous="true">
        <button id="export_button" text="&amp;Export" minwidth="60" magnet="true" />
        <button text="&amp;Cancel" minwidth="60" closewindow="true" />
      </hbox>
    </hbox>
  </grid>
  </window>
</gui>