# Bond Modify

- Type
- View

Change here the properties related with the charge distribution of the bond (or list of bonds, previously selected with Bond->Select, when Global is pressed). Parameters for empty entries or Local choices remain unchanged.

To change the bond name write the new name in the Bond entry, followed by the bond number (GAMGI only needs the number to identify the bond).

### Covalency

Change the bond Covalency, which is a measure of its percentage ionic/covalent character.

### Order

Change the bond Order, which represents its chemical order. Although any positive number is allowed, the usual values are 1.0 (single bond, the default), 2.0 (double bond), 3.0 (triple bond) and 1.5 (aromatic or delocalised bond).

Single, double and triple bonds are rendered in Wired mode, as single, double and triple rasterized lines. In Solid mode, single bonds are represented by a cylinder (the sigma bond), double bonds have two additional curved volumes on each side (the pi bond), and triple bonds have two more curved volumes on each side (the second pi bond).

Currently, the orientation of the curved volumes in solid secondary bonds is arbitrary. Currently, aromatic bonds are handled as normal bonds, according to its bond order, so bonds with order equal to 1.5 are handled as double bonds.
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