HELP NEEDED - Arpagiator & Accents

Right this may seem a silly question, but I am righting my own arpagiated midi parts, thus having more control over the rhythum of the arp playing.  The only thing I am stuck on if its possible.

How do you right an Accent in a midi part.

The gate you change by the length of the note or the volocity, but I can work out how to make an Accent?

Does anyone know how you would do this.

accent is normally a velocity controlled filter envelope.

most synths let you set it up…