Hi,
First specify your page size in the Plot Details - Page Properties dialog.
Then run this LabTalk code by opening the Script Window from the Window menu and pasting it into the window. Then select the entire script in the Script Window and click Enter.
// Get Page width & height in inches
double pgCenterX = (page.width / page.resx) / 2;
double pgCenterY = (page.height / page.resy) / 2;
// Get Layer half width and half height in inches
int nOld = Layer.unit;
Layer.unit = 2; // Convert to inches
double layHalfX = Layer.width / 2;
double layHalfY = Layer.height / 2;
// Center Layer horizontally (X)
Layer.left = pgCenterX - layHalfX;
// Center Layer vertically (Y)
Layer.top = pgCenterY - layHalfY;
// Restore previous Layer unit value
Layer.unit = nOld;
~Chris
