\ltjsetparameter{yjabaselineshift=10pt}\gbox{あ}
\ltjsetparameter{yjabaselineshift=20pt}\gbox{あ}
+
+\tenmin
+\ltjsetparameter{jatextfont={0,\tenmin}}\jfam=0
+\def\R#1#2{\ltjsetparameter{yjabaselineshift=#1,yalbaselineshift=#2}%
+ {\tt\frenchspacing
+ yja: \ltjgetparameter{yjabaselineshift},
+ yal: \ltjgetparameter{yalbaselineshift}}. }
+
+\def\frac#1#2{{#1\over#2}}
+\def\D{%
+ \vrule width 40pt height 0.4pt depth 0pt%
+ 積分のテストabc$\displaystyle かきく\int_0^x t\,dt = \frac{x^2}2$
+ \vrule width 40pt height 0.4pt depth 0pt\par
+}
+\baselineskip=40pt
+
+\R{ 0pt}{ 0pt}\D
+\R{ 0pt}{10pt}\D
+\R{-10pt}{0pt}\D
+\R{10pt}{ 0pt}\D
+\R{10pt}{10pt}\D
+
\end