I am Leo

<textField textAdjust="ScaleFont"> <reportElement x="0" y="0" width="1520" height="15" uuid="6cb61704-2f0a-4b05-b714-f0219175f001"> <property name="com.jaspersoft.studio.element.name" value="content"/> </reportElement> <box topPadding="35" leftPadding="35" bottomPadding="35" rightPadding="35"/> <textFieldExpression><![CDATA[$F{point4}]]></textFieldExpression></textField>[/code]Just use textAdjust="ScaleFont" in your text field. 

I have a file named some-image.png I put in src/main/resources/static/images
And in my jasper template:
 
<image onErrorType="Blank"> <reportElement style="some-row" mode="Opaque" x="0" y="0" width="3116" height="843" forecolor="#FFFFFF" uuid="33d8b7cf-29f9-45ee-9397-4090f1e648a2"> <property name="com.jaspersoft.studio.element.name" value="someImg"/> <property name="com.jaspersoft.studio.unit.width" value="px"/> <property name="com.jaspersoft.studio.unit.height" value="px"/> </reportElement> <box> <pen lineWidth="0.0" lineColor="#FFFFFF"/> </box> <imageExpression><![CDATA["static/images/some-image.png"]]></imageExpression></image>[/code]You can point to your subreport use the above way.
Hope this can help you.

In my opinion,
Because your list is on page #1 so that It will print the page number is 1.
So for the workaround solution, you can calculate the page number base on the total record you have, total record on one page and current index ($V{REPORT_COUNT})

I scale everything with (300/72)=4.17 times and they are fit with 300 DPI.