Captions can be shown at different positions on a slide-per-slide basis.
Text is divided into 2 sections when the Read More separator is used in an article or K2 item.

Position 2-part text Result
s no
The caption is at the bottom.
Title, text and links take the full caption block width
sw
ws
no
Titles, text and links appear at the bottom left side of the caption block
se
es
no
Titles, text and links appear at the bottom right side of the caption block
s
sw
ws
yes
The caption is at the bottom.
Titles and links appear on the left side of the 2-column caption block
se
es
yes
The caption is at the bottom.
Titles and links appear on the right side of the 2-column caption block
c no
Titles, text and link will show in the middle of the slide, taking 70% of its width and will adjust the height automatically depending on content
c
cw
wc
yes
Titles, text and link will show in the middle of the slide, taking 70% of its width and will adjust the height automatically depending on content.
Titles and links appear on the left side of the 2-column caption
ce
ec
yes
Titles, text and link will show in the middle of the slide, taking 70% of its width and will adjust the height automatically depending on content.
Titles and links appear on the right side of the 2-column caption
 n no
The caption is at the top.
Titles, text and links take the full caption block width
nw
wn
no
Titles, text and links appear at the top left side of the caption block
ne
en
no
Titles, text and links appear at the top right side of the caption block
n
nw
wn
yes 
The caption is at the top.
Titles and links appear on the left side of the 2-column caption block
ne
en
yes
The caption is at the top.
Titles and links appear on the right side of the 2-column caption block
s: South, n: North, e: East, w: West, c: Center