Hi,
You can try this tweak:
add some fields inside:
<field
name="num_leading_articles"
type="text"
label="JGLOBAL_NUM_LEADING_ARTICLES_LABEL"
description="JGLOBAL_NUM_LEADING_ARTICLES_DESC"
useglobal="true"
size="3"
/>
<field
name="num_intro_articles"
type="text"
label="JGLOBAL_NUM_INTRO_ARTICLES_LABEL"
description="JGLOBAL_NUM_INTRO_ARTICLES_DESC"
useglobal="true"
size="3"
/>
<field
name="num_columns"
type="text"
label="JGLOBAL_NUM_COLUMNS_LABEL"
description="JGLOBAL_NUM_COLUMNS_DESC"
useglobal="true"
size="3"
/>
<field
name="num_links"
type="text"
label="JGLOBAL_NUM_LINKS_LABEL"
description="JGLOBAL_NUM_LINKS_DESC"
useglobal="true"
size="3"
/>
http://prntscr.com/hamdgc
Then access this Blog Layout tab in xLayout-Blog menu item and configure as you wish.
However, you will need to customize the style a bit for the layout setup.