Magento – Magento 2 : Rupee (currency) symbol overlapping on price

You need to edit just below three line in AbstractPdf.php

Replace line 391

$page->drawRectangle(25, $top, 570, $top - 70);

Instead of

$page->drawRectangle(25, $top, 570, $top - 55);

Replace line 397

$page->drawText(__('Order # ') . $order->getRealOrderId(), 35, $top -= 45, 'UTF-8');

instead of

$page->drawText(__('Order # ') . $order->getRealOrderId(), 35, $top -= 30, 'UTF-8');

Additional add after line no 621

$page->drawText('My Sample Text', 35, $docHeader[1] - 30, 'UTF-8');

You can print invoice your Magento order from admin by follow below steps

Admin >> Sales >> Order >> Open Order >> Click Invoice >> Submit Invoice

Now you can see your order invoice in "Invoices" tab just under "ORDER VIEW".

Click on "View" link, you can see you print button for invoice print.