Function to show numbers in a jsPDF pdf to help you put text in correct point.

mostraregua.js

/**
 * Mostra números x : y para ajudar a colocar os dados nos locais certos.
 * @param {*} doc 
 */
function mostraRegua(doc) {
	let pH = doc.internal.pageSize.height;
	let pW = doc.internal.pageSize.width;
	doc.setFontSize(5);
	doc.setTextColor(255, 0, 0);
	doc.setDrawColor(0,0,255);
	for (var y = 0; y < pH; y += 50) {
		for (var x = 0; x < pW; x += 50) {	
			doc.text(x+3, y+2, '' + x + " / " + y);
			doc.circle(x, y, 1);
		}
	}
	return doc;
}