A description of how to dispose of the current image
before displaying the next.
It is expressed as one of the following values:
<dl>
<dt><code>DM_UNSPECIFIED</code></dt>
<dd>disposal method not specified</dd>
<dt><code>DM_FILL_NONE</code></dt>
<dd>do nothing - leave the image in place</dd>
<dt><code>DM_FILL_BACKGROUND</code></dt>
<dd>fill with the background color</dd>
<dt><code>DM_FILL_PREVIOUS</code></dt>
<dd>restore the previous picture</dd>
</dl>
(this field corresponds to the GIF89a Disposal Method value)
A description of how to dispose of the current image before displaying the next.
It is expressed as one of the following values: <dl> <dt><code>DM_UNSPECIFIED</code></dt> <dd>disposal method not specified</dd> <dt><code>DM_FILL_NONE</code></dt> <dd>do nothing - leave the image in place</dd> <dt><code>DM_FILL_BACKGROUND</code></dt> <dd>fill with the background color</dd> <dt><code>DM_FILL_PREVIOUS</code></dt> <dd>restore the previous picture</dd> </dl> (this field corresponds to the GIF89a Disposal Method value)