# GridNavigation
```csharp
public static class GridNavigation
```
Namespace `SharpCell.Grid` ยท package `SharpCell.Grid`
How the active cell moves on a sheet, as in Excel: a merged area counts as one cell.
## Methods
### CurrentRegion(Worksheet, CellPosition)
```csharp
public static CellArea CurrentRegion(Worksheet? sheet, CellPosition cell)
```
The current region of a cell, as Excel's Ctrl+A and Ctrl+* select it: the cell grown, row by row and column by column, while a cell with content touches it, also diagonally. A cell with nothing around it is its own region.
**Parameters**
- `sheet`: The sheet whose content is looked at; without one, the cell.
- `cell`: The cell to start from.
### Move(Worksheet, CellPosition, int, int)
```csharp
public static CellPosition Move(Worksheet? sheet, CellPosition from, int rows, int columns)
```
The cell a move by whole rows and columns lands on, kept inside the sheet. Leaving a merged area starts from its far edge; landing inside one gives its top-left cell.
### MoveToEdge(Worksheet, CellPosition, int, int)
```csharp
public static CellPosition MoveToEdge(Worksheet? sheet, CellPosition from, int rows, int columns)
```
The cell Ctrl with an arrow lands on, as in Excel: from a cell with content whose neighbour has content too, the last cell with content before an empty one; otherwise the next cell with content that way; with none, the sheet's edge. A cell has content when it holds a value or a formula.
**Parameters**
- `sheet`: The sheet whose content is looked at; without one, the edge.
- `from`: The cell to move from.
- `rows`: -1 up, 1 down, or 0.
- `columns`: -1 left, 1 right, or 0.