# Re: [NTG-context] setupformulas options (or defineformula) and effort to reduce the font in math formulas

```Hello Wolfgang.

After some searching and experimenting, here is my functional solution.
```
I wrote it into the wiki. I have not found there eg. defineformula command etc
```
Jaroslav Hajtmar

\defineformula[MY][
align=left,
strut=no,
spacebefore=,
spaceafter=,
]

% so you can modify the settings of defineforumla[MY]
\setupformulae[MY][align=right,strut=yes,spacebefore=medium,spaceafter=big]

% so we can create new start-stopsmallformula
\definestartstop[smallformula]
[before={\startformula[small]},
after=\stopformula,
]

% and we can so create new start-stopmysmallformula:
\definestartstop[mysmallformula]
[before={\startMYformula[small]},
after=\stopMYformula,
]

% and here is my shortcuts:
\let\bmyformula\startmysmallformula
\let\emyformula\stopmysmallformula

\starttext

\title{Example of use and behavior}

startformula:

\startformula
c^2 = a^2 + b^2
\stopformula

startformula\$[\$small\$]\$:

\startformula[small]
c^2 = a^2 + b^2
\stopformula

startformula[8pt]:

\startformula[8pt]
c^2 = a^2 + b^2
\stopformula

startsmallformula:

\startsmallformula
c^2 = a^2 + b^2
\stopsmallformula

startmysmallformula:

\startmysmallformula
c^2 = a^2 + b^2
\stopmysmallformula

startMYformula:

\startMYformula
c^2 = a^2 + b^2
\stopMYformula

startMYformula[5pt]:

\startMYformula[5pt]
c^2 = a^2 + b^2
\stopMYformula

bmyformula:

\bmyformula
c^2 = a^2 + b^2
\emyformula

\stoptext

http://wiki.contextgarden.net/defineformula

Dne 11.3.2015 v 18:18 Jaroslav Hajtmar napsal(a):
```
```Thanx Wolfgang for reply.
```
I had no idea that it is possible in this way to change the font size. I could not figure a way for your solution set alignment formulas to right and how work \defineformula and \definestartstop together.
```
```
After defining a new MY formula in combination with your solution works it fine, as I had imagined. Is there any possibility of setting of parameters a newly defined formulas? Or, it can not be done, and everything must be solved within the initial definition?
```
One more thanx
Jaroslav Hajtmar

\defineformula[MY][
align=right,
strut=yes,
spacebefore=,
spaceafter=,
]

\definestartstop[smallformula]
[before={\startformula[small]},
after=\stopformula,
]

% \setupformulas[align=right,strut=yes,spacebefore=,spaceafter=]
```
% \setupformulas[smallformula][align=right,strut=yes,spacebefore=,spaceafter=]
```% \setupformulas[small][align=right,strut=yes,spacebefore=,spaceafter=]
% \setupsmallformulas[align=right,strut=yes,spacebefore=,spaceafter=]
```
% \setupsmallformulaformulas[align=right,strut=yes,spacebefore=,spaceafter=]
```% \setupformulas[MY][align=right,strut=yes,spacebefore=,spaceafter=]
```
% \setupformulas[MYformula][align=right,strut=yes,spacebefore=,spaceafter=]
```% \setupMYformulas[align=right,strut=yes,spacebefore=,spaceafter=]

\starttext

\startformula
c^2 = a^2 + b^2
\stopformula

\startformula[small]
c^2 = a^2 + b^2
\stopformula

\startformula[8pt]
c^2 = a^2 + b^2
\stopformula

\startsmallformula
c^2 = a^2 + b^2
\stopsmallformula

\startMYformula[small]
c^2 = a^2 + b^2
\stopMYformula

\startMYformula[5pt]
c^2 = a^2 + b^2
\stopMYformula

\stoptext

Dne 11.3.2015 v 0:52 Wolfgang Schuster napsal(a):
```
\startformula has a optional argument which let you change the font, e.g. \startformula[9pt].
```
\definestartstop[smallformula]
[before={\startformula[small]},
after=\stopformula]

\starttext

\startformula
c^2  = a^2  + b^2
\stopformula

\startformula[small]
c^2  = a^2  + b^2
\stopformula

\startsmallformula
c^2  = a^2  + b^2
\stopsmallformula

\stoptext
```
```
```
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```
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```
```
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