# Frequently asked questions - Math

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## How do I correct the arrows of the vectors or the angles which appear too short?

Due to a recording error, the arrows of the vectors or the angles may appear too short. To correct, the formula must be reedited and closed. So you have to double-click and then double-escape on each formula.

If the number of formulas is important in a document it can quickly become tiring. The following macro works for you:

```
Sub ReviseFormules
dim i as integer
dim TheObjets as Object
dim Objet as Object
TheObjets=ThisComponent.getEmbeddedObjects
On error goto erreur
for i=0 to TheObjets.count-1
Objet=TheObjets(i)
if Objet.getImplementationName="SwXTextEmbeddedObject" then
if Objet.embeddedObject.component.getImplementationName="com.sun.star.comp.Math.FormulaDocument" then
Objet.embeddedObject.setmodified(true)
Objet.embeddedObject.update
EndIf
endif
next i
erreur:
resume next
end sub
```